1057939644 has 24 divisors (see below), whose sum is σ = 2481061968. Its totient is φ = 350855680.

The previous prime is 1057939607. The next prime is 1057939661. The reversal of 1057939644 is 4469397501.

It is a super-2 number, since 2×1057939644² = 2238472580693693472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1057939593 and 1057939602.

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 7 ways as a sum of consecutive naturals, for example, 221397 + ... + 226124.

It is an arithmetic number, because the mean of its divisors is an integer number (103377582).

Almost surely, 2^1057939644 is an apocalyptic number.

It is an amenable number.

1057939644 is an abundant number, since it is smaller than the sum of its proper divisors (1423122324).

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

1057939644 is a wasteful number, since it uses less digits than its factorization.

1057939644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447725 (or 447723 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 1057939644 is about 32525.9841357644. The cubic root of 1057939644 is about 1018.9517758888.

The spelling of 1057939644 in words is "one billion, fifty-seven million, nine hundred thirty-nine thousand, six hundred forty-four".