1056403780 has 48 divisors (see below), whose sum is σ = 2246178816. Its totient is φ = 417312000.

The previous prime is 1056403769. The next prime is 1056403787. The reversal of 1056403780 is 873046501.

It is a super-2 number, since 2×1056403780² = 2231977892796576800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1056403787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636712 + ... + 638368.

It is an arithmetic number, because the mean of its divisors is an integer number (46795392).

Almost surely, 2^1056403780 is an apocalyptic number.

1056403780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1056403780 is an abundant number, since it is smaller than the sum of its proper divisors (1189775036).

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

1056403780 is a wasteful number, since it uses less digits than its factorization.

1056403780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044 (or 2042 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1056403780 is about 32502.3657600489. The cubic root of 1056403780 is about 1018.4584492967.

The spelling of 1056403780 in words is "one billion, fifty-six million, four hundred three thousand, seven hundred eighty".