1156026620 has 96 divisors (see below), whose sum is σ = 2897664000. Its totient is φ = 387035712.

The previous prime is 1156026601. The next prime is 1156026629. The reversal of 1156026620 is 266206511.

It is a super-2 number, since 2×1156026620² = 2672795092297248800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156026629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 293021 + ... + 296939.

It is an arithmetic number, because the mean of its divisors is an integer number (30184000).

Almost surely, 2^1156026620 is an apocalyptic number.

1156026620 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 1156026620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448832000).

1156026620 is an abundant number, since it is smaller than the sum of its proper divisors (1741637380).

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

1156026620 is a wasteful number, since it uses less digits than its factorization.

1156026620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992 (or 3976 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1156026620 is about 34000.3914683346. The cubic root of 1156026620 is about 1049.5165181514.

The spelling of 1156026620 in words is "one billion, one hundred fifty-six million, twenty-six thousand, six hundred twenty".