1056155980 has 24 divisors (see below), whose sum is σ = 2419557840. Its totient is φ = 384056640.

The previous prime is 1056155953. The next prime is 1056155987. The reversal of 1056155980 is 895516501.

It is a super-2 number, since 2×1056155980² = 2230930908179520800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1056155987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2400135 + ... + 2400574.

It is an arithmetic number, because the mean of its divisors is an integer number (100814910).

Almost surely, 2^1056155980 is an apocalyptic number.

1056155980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1056155980 is an abundant number, since it is smaller than the sum of its proper divisors (1363401860).

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

1056155980 is a wasteful number, since it uses less digits than its factorization.

1056155980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4800729 (or 4800727 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 40.

The square root of 1056155980 is about 32498.5535062716. The cubic root of 1056155980 is about 1018.3788100072.

The spelling of 1056155980 in words is "one billion, fifty-six million, one hundred fifty-five thousand, nine hundred eighty".