1157578290 has 80 divisors (see below), whose sum is σ = 3395589120. Its totient is φ = 280622880.

The previous prime is 1157578267. The next prime is 1157578307. The reversal of 1157578290 is 928757511.

1157578290 is a `hidden beast` number, since 1 + 1 + 57 + 578 + 29 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 56050 + ... + 73869.

It is an arithmetic number, because the mean of its divisors is an integer number (42444864).

Almost surely, 2^1157578290 is an apocalyptic number.

1157578290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1157578290 is an abundant number, since it is smaller than the sum of its proper divisors (2238010830).

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

1157578290 is a wasteful number, since it uses less digits than its factorization.

1157578290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129949 (or 129940 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 45.

The square root of 1157578290 is about 34023.2022302428. The cubic root of 1157578290 is about 1049.9858773611.

The spelling of 1157578290 in words is "one billion, one hundred fifty-seven million, five hundred seventy-eight thousand, two hundred ninety".