1155657008 has 40 divisors (see below), whose sum is σ = 2586330000. Its totient is φ = 494397440.

The previous prime is 1155656987. The next prime is 1155657023. The reversal of 1155657008 is 8007565511.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190133 + ... + 196116.

It is an arithmetic number, because the mean of its divisors is an integer number (64658250).

Almost surely, 2^1155657008 is an apocalyptic number.

It is an amenable number.

1155657008 is an abundant number, since it is smaller than the sum of its proper divisors (1430672992).

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

1155657008 is a wasteful number, since it uses less digits than its factorization.

1155657008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386285 (or 386279 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 38.

The square root of 1155657008 is about 33994.9556257984. The cubic root of 1155657008 is about 1049.4046535853.

The spelling of 1155657008 in words is "one billion, one hundred fifty-five million, six hundred fifty-seven thousand, eight".