Search a number
-
+
2801680392880 = 245291207620859
BaseRepresentation
bin101000110001010001001…
…010100010001010110000
3100220211121220221101122001
4220301101022202022300
5331400320140033010
65543024010023344
7406262152260505
oct50612112421260
910824556841561
102801680392880
119902055a6626
12392b99117b54
131742746b3955
14998600754ac
154cd28a9dc3a
hex28c512a22b0

2801680392880 has 40 divisors (see below), whose sum is σ = 6738524398800. Its totient is φ = 1082028288768.

The previous prime is 2801680392757. The next prime is 2801680392883. The reversal of 2801680392880 is 882930861082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (2801680392883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603808110 + ... + 603812749.

It is an arithmetic number, because the mean of its divisors is an integer number (168463109970).

Almost surely, 22801680392880 is an apocalyptic number.

2801680392880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2801680392880 is an abundant number, since it is smaller than the sum of its proper divisors (3936844005920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2801680392880 is a wasteful number, since it uses less digits than its factorization.

2801680392880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207620901 (or 1207620895 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 55.

The spelling of 2801680392880 in words is "two trillion, eight hundred one billion, six hundred eighty million, three hundred ninety-two thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 29 40 58 80 116 145 232 290 464 580 1160 2320 1207620859 2415241718 4830483436 6038104295 9660966872 12076208590 19321933744 24152417180 35021004911 48304834360 70042009822 96609668720 140084019644 175105024555 280168039288 350210049110 560336078576 700420098220 1400840196440 2801680392880