1157809408 has 36 divisors (see below), whose sum is σ = 2641256800. Its totient is φ = 496203264.

The previous prime is 1157809399. The next prime is 1157809409. The reversal of 1157809408 is 8049087511.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157809409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321258 + ... + 324841.

Almost surely, 2^1157809408 is an apocalyptic number.

It is an amenable number.

1157809408 is an abundant number, since it is smaller than the sum of its proper divisors (1483447392).

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

1157809408 is an frugal number, since it uses more digits than its factorization.

1157809408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646122 (or 646108 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 1157809408 is about 34026.5985370269. The cubic root of 1157809408 is about 1050.0557515371.

The spelling of 1157809408 in words is "one billion, one hundred fifty-seven million, eight hundred nine thousand, four hundred eight".