51389938 has 16 divisors (see below), whose sum is σ = 79530624. Its totient is φ = 24892560.

The previous prime is 51389881. The next prime is 51389953. The reversal of 51389938 is 83998315.

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 7 ways as a sum of consecutive naturals, for example, 5031 + ... + 11317.

It is an arithmetic number, because the mean of its divisors is an integer number (4970664).

Almost surely, 2^51389938 is an apocalyptic number.

51389938 is a deficient number, since it is larger than the sum of its proper divisors (28140686).

51389938 is a wasteful number, since it uses less digits than its factorization.

51389938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6417.

The product of its digits is 233280, while the sum is 46.

The square root of 51389938 is about 7168.6775628424. The cubic root of 51389938 is about 371.7857140634.

The spelling of 51389938 in words is "fifty-one million, three hundred eighty-nine thousand, nine hundred thirty-eight".