1057639144 has 16 divisors (see below), whose sum is σ = 1983425220. Its totient is φ = 528725760.

The previous prime is 1057639087. The next prime is 1057639151. The reversal of 1057639144 is 4419367501.

1057639144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 960380100 + 97259044 = 30990^2 + 9862^2 .

It is a super-2 number, since 2×1057639144² = 2237201117842105472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1057639097 and 1057639106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68352 + ... + 82384.

Almost surely, 2^1057639144 is an apocalyptic number.

It is an amenable number.

1057639144 is a deficient number, since it is larger than the sum of its proper divisors (925786076).

1057639144 is a wasteful number, since it uses less digits than its factorization.

1057639144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23460 (or 23456 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1057639144 is about 32521.3644240213. The cubic root of 1057639144 is about 1018.8552914923.

The spelling of 1057639144 in words is "one billion, fifty-seven million, six hundred thirty-nine thousand, one hundred forty-four".