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2478889999 = 37971394969
BaseRepresentation
bin1001001111000000…
…1101110000001111
320101202110122210201
42103300031300033
520034043434444
61045551114331
7115300134355
oct22360156017
96352418721
102478889999
1110622a5823
125922129a7
1330674aa21
141973177d5
hex93c0dc0f

2478889999 has 16 divisors (see below), whose sum is σ = 2591159200. Its totient is φ = 2369378304.

The previous prime is 2478889993. The next prime is 2478890017. The reversal of 2478889999 is 9999888742.

It is a 11-Lehmer number, since φ(2478889999) divides (2478889999-1)11.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-2478889999 is a prime.

It is a super-3 number, since 3×24788899993 (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478889993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496387 + ... + 501355.

It is an arithmetic number, because the mean of its divisors is an integer number (161947450).

Almost surely, 22478889999 is an apocalyptic number.

2478889999 is a deficient number, since it is larger than the sum of its proper divisors (112269201).

2478889999 is a wasteful number, since it uses less digits than its factorization.

2478889999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5242.

The product of its digits is 188116992, while the sum is 73.

The square root of 2478889999 is about 49788.4524664103. The cubic root of 2478889999 is about 1353.3779147161.

The spelling of 2478889999 in words is "two billion, four hundred seventy-eight million, eight hundred eighty-nine thousand, nine hundred ninety-nine".