255157992 has 128 divisors (see below), whose sum is σ = 756480000. Its totient is φ = 79455168.

The previous prime is 255157963. The next prime is 255157997. The reversal of 255157992 is 299751552.

255157992 is a `hidden beast` number, since 2 + 551 + 5 + 7 + 9 + 92 = 666.

Its product of digits (283500) is a multiple of the sum of its prime factors (900).

It is not an unprimeable number, because it can be changed into a prime (255157997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323823 + ... + 324609.

It is an arithmetic number, because the mean of its divisors is an integer number (5910000).

Almost surely, 2^255157992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255157992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378240000).

255157992 is an abundant number, since it is smaller than the sum of its proper divisors (501322008).

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

255157992 is a wasteful number, since it uses less digits than its factorization.

255157992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 890 counting only the distinct ones).

The product of its digits is 283500, while the sum is 45.

The square root of 255157992 is about 15973.6655780694. The cubic root of 255157992 is about 634.2635080403.

The spelling of 255157992 in words is "two hundred fifty-five million, one hundred fifty-seven thousand, nine hundred ninety-two".