Search a number
-
+
154897920 = 2936583
BaseRepresentation
bin10010011101110…
…00111000000000
3101210110122000000
421032320320000
5304123213140
623212000000
73560416302
oct1116707000
9353418000
10154897920
117a488111
1243a60000
1326125398
1416801972
15d8eaa30
hex93b8e00

154897920 has 280 divisors, whose sum is σ = 563542056. Its totient is φ = 40808448.

The previous prime is 154897913. The next prime is 154897933. The reversal of 154897920 is 29798451.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1866199 + ... + 1866281.

Almost surely, 2154897920 is an apocalyptic number.

154897920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154897920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281771028).

154897920 is an abundant number, since it is smaller than the sum of its proper divisors (408644136).

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

154897920 is an frugal number, since it uses more digits than its factorization.

154897920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 154897920 is about 12445.7992913272. The cubic root of 154897920 is about 537.0505866642.

It can be divided in two parts, 15489 and 7920, that added together give a square (23409 = 1532).

The spelling of 154897920 in words is "one hundred fifty-four million, eight hundred ninety-seven thousand, nine hundred twenty".