1957001996 has 24 divisors (see below), whose sum is σ = 3514374864. Its totient is φ = 952977920.

The previous prime is 1957001987. The next prime is 1957002053. The reversal of 1957001996 is 6991007591.

It is a self number, because there is not a number n which added to its sum of digits gives 1957001996.

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, 87191 + ... + 107313.

It is an arithmetic number, because the mean of its divisors is an integer number (146432286).

Almost surely, 2^1957001996 is an apocalyptic number.

It is an amenable number.

1957001996 is a deficient number, since it is larger than the sum of its proper divisors (1557372868).

1957001996 is a wasteful number, since it uses less digits than its factorization.

1957001996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20761 (or 20759 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 47.

The square root of 1957001996 is about 44238.0152809775. The cubic root of 1957001996 is about 1250.8265458171.

The spelling of 1957001996 in words is "one billion, nine hundred fifty-seven million, one thousand, nine hundred ninety-six".