1156573440 has 216 divisors, whose sum is σ = 4365885888. Its totient is φ = 280350720.

The previous prime is 1156573433. The next prime is 1156573441. The reversal of 1156573440 is 443756511.

It is a super-2 number, since 2×1156573440² = 2675324244226867200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1156573395 and 1156573404.

It is not an unprimeable number, because it can be changed into a prime (1156573441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122157 + ... + 131283.

Almost surely, 2^1156573440 is an apocalyptic number.

1156573440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1156573440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2182942944).

1156573440 is an abundant number, since it is smaller than the sum of its proper divisors (3209312448).

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

1156573440 is a wasteful number, since it uses less digits than its factorization.

1156573440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9165 (or 9148 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 1156573440 is about 34008.4318956344. The cubic root of 1156573440 is about 1049.6819717112.

The spelling of 1156573440 in words is "one billion, one hundred fifty-six million, five hundred seventy-three thousand, four hundred forty".