1057079890 has 16 divisors (see below), whose sum is σ = 2014670232. Its totient is φ = 397959424.

The previous prime is 1057079887. The next prime is 1057079893. The reversal of 1057079890 is 989707501.

It is an interprime number because it is at equal distance from previous prime (1057079887) and next prime (1057079893).

It can be written as a sum of positive squares in 4 ways, for example, as 639735849 + 417344041 = 25293^2 + 20429^2 .

It is a super-2 number, since 2×1057079890² = 2234835787684824200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1057079890.

It is not an unprimeable number, because it can be changed into a prime (1057079893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3108889 + ... + 3109228.

Almost surely, 2^1057079890 is an apocalyptic number.

1057079890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1057079890 is a deficient number, since it is larger than the sum of its proper divisors (957590342).

1057079890 is a wasteful number, since it uses less digits than its factorization.

1057079890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6218141.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 1057079890 is about 32512.7650315995. The cubic root of 1057079890 is about 1018.6756778179.

The spelling of 1057079890 in words is "one billion, fifty-seven million, seventy-nine thousand, eight hundred ninety".