1957293820 has 12 divisors (see below), whose sum is σ = 4110317064. Its totient is φ = 782917520.

The previous prime is 1957293817. The next prime is 1957293853. The reversal of 1957293820 is 283927591.

It is a congruent number.

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, 48932326 + ... + 48932365.

It is an arithmetic number, because the mean of its divisors is an integer number (342526422).

Almost surely, 2^1957293820 is an apocalyptic number.

1957293820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1957293820 is an abundant number, since it is smaller than the sum of its proper divisors (2153023244).

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

1957293820 is a wasteful number, since it uses less digits than its factorization.

1957293820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97864700 (or 97864698 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1957293820 is about 44241.3134976800. The cubic root of 1957293820 is about 1250.8887162636. Note that the first 3 decimals are identical.

The spelling of 1957293820 in words is "one billion, nine hundred fifty-seven million, two hundred ninety-three thousand, eight hundred twenty".