1057025690 has 32 divisors (see below), whose sum is σ = 2210108544. Its totient is φ = 356466240.

The previous prime is 1057025687. The next prime is 1057025707. The reversal of 1057025690 is 965207501.

It is a super-2 number, since 2×1057025690² = 2234606618639952200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1057025690.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119504 + ... + 128043.

It is an arithmetic number, because the mean of its divisors is an integer number (69065892).

Almost surely, 2^1057025690 is an apocalyptic number.

1057025690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1057025690 is an abundant number, since it is smaller than the sum of its proper divisors (1153082854).

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

1057025690 is a wasteful number, since it uses less digits than its factorization.

1057025690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247622.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 1057025690 is about 32511.9315021424. The cubic root of 1057025690 is about 1018.6582672242.

The spelling of 1057025690 in words is "one billion, fifty-seven million, twenty-five thousand, six hundred ninety".