1938118656 has 48 divisors (see below), whose sum is σ = 5167071000. Its totient is φ = 646037504.

The previous prime is 1938118631. The next prime is 1938118687. The reversal of 1938118656 is 6568118391.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151581 + ... + 163868.

Almost surely, 2^1938118656 is an apocalyptic number.

1938118656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1938118656 is an abundant number, since it is smaller than the sum of its proper divisors (3228952344).

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

1938118656 is an equidigital number, since it uses as much as digits as its factorization.

1938118656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315474 (or 315454 counting only the distinct ones).

The product of its digits is 311040, while the sum is 48.

The square root of 1938118656 is about 44024.0690531895. The cubic root of 1938118656 is about 1246.7904125054.

The spelling of 1938118656 in words is "one billion, nine hundred thirty-eight million, one hundred eighteen thousand, six hundred fifty-six".