1056105990 has 24 divisors (see below), whose sum is σ = 2745875808. Its totient is φ = 281628240.

The previous prime is 1056105983. The next prime is 1056106033. The reversal of 1056105990 is 995016501.

1056105990 is a `hidden beast` number, since 1 + 0 + 5 + 61 + 0 + 599 + 0 = 666.

It is a super-2 number, since 2×1056105990² = 2230719724227760200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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 11 ways as a sum of consecutive naturals, for example, 5867166 + ... + 5867345.

It is an arithmetic number, because the mean of its divisors is an integer number (114411492).

Almost surely, 2^1056105990 is an apocalyptic number.

1056105990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1056105990 is an abundant number, since it is smaller than the sum of its proper divisors (1689769818).

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

1056105990 is a wasteful number, since it uses less digits than its factorization.

1056105990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11734524 (or 11734521 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 1056105990 is about 32497.7843860162. The cubic root of 1056105990 is about 1018.3627424437.

The spelling of 1056105990 in words is "one billion, fifty-six million, one hundred five thousand, nine hundred ninety".