1156404400 has 30 divisors (see below), whose sum is σ = 2778262532. Its totient is φ = 462561600.

The previous prime is 1156404341. The next prime is 1156404407. The reversal of 1156404400 is 44046511.

It is a super-2 number, since 2×1156404400² = 2674542272678720000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1156404407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1445106 + ... + 1445905.

Almost surely, 2^1156404400 is an apocalyptic number.

1156404400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156404400 is an abundant number, since it is smaller than the sum of its proper divisors (1621858132).

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

1156404400 is a wasteful number, since it uses less digits than its factorization.

1156404400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891029 (or 2891018 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1156404400 is about 34005.9465388041. The cubic root of 1156404400 is about 1049.6308301582.

The spelling of 1156404400 in words is "one billion, one hundred fifty-six million, four hundred four thousand, four hundred".