1957453994 has 16 divisors (see below), whose sum is σ = 3019871400. Its totient is φ = 950906304.

The previous prime is 1957453969. The next prime is 1957454039. The reversal of 1957453994 is 4993547591.

It can be written as a sum of positive squares in 4 ways, for example, as 1692252769 + 265201225 = 41137^2 + 16285^2 .

It is a super-2 number, since 2×1957453994² = 7663252277253104072, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33812 + ... + 71120.

Almost surely, 2^1957453994 is an apocalyptic number.

1957453994 is a deficient number, since it is larger than the sum of its proper divisors (1062417406).

1957453994 is a wasteful number, since it uses less digits than its factorization.

1957453994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38057.

The product of its digits is 6123600, while the sum is 56.

The square root of 1957453994 is about 44243.1236917106. The cubic root of 1957453994 is about 1250.9228372495.

The spelling of 1957453994 in words is "one billion, nine hundred fifty-seven million, four hundred fifty-three thousand, nine hundred ninety-four".