1056388566 has 16 divisors (see below), whose sum is σ = 2113095600. Its totient is φ = 352076448.

The previous prime is 1056388561. The next prime is 1056388577. The reversal of 1056388566 is 6658836501.

It is a super-2 number, since 2×1056388566² = 2231913604751072712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056388561) 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, 72720 + ... + 86028.

It is an arithmetic number, because the mean of its divisors is an integer number (132068475).

Almost surely, 2^1056388566 is an apocalyptic number.

1056388566 is an abundant number, since it is smaller than the sum of its proper divisors (1056707034).

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

1056388566 is a wasteful number, since it uses less digits than its factorization.

1056388566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26543.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The square root of 1056388566 is about 32502.1317147045. The cubic root of 1056388566 is about 1018.4535600989.

The spelling of 1056388566 in words is "one billion, fifty-six million, three hundred eighty-eight thousand, five hundred sixty-six".