1056643520 has 28 divisors (see below), whose sum is σ = 2516133144. Its totient is φ = 422657280.

The previous prime is 1056643499. The next prime is 1056643543. The reversal of 1056643520 is 253466501.

It is a super-2 number, since 2×1056643520² = 2232991056715980800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1650686 + ... + 1651325.

It is an arithmetic number, because the mean of its divisors is an integer number (89861898).

Almost surely, 2^1056643520 is an apocalyptic number.

1056643520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1056643520 is an abundant number, since it is smaller than the sum of its proper divisors (1459489624).

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

1056643520 is an equidigital number, since it uses as much as digits as its factorization.

1056643520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302028 (or 3302018 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1056643520 is about 32506.0535900623. The cubic root of 1056643520 is about 1018.5354863682.

The spelling of 1056643520 in words is "one billion, fifty-six million, six hundred forty-three thousand, five hundred twenty".