51392638 has 24 divisors (see below), whose sum is σ = 85308840. Its totient is φ = 23028000.

The previous prime is 51392629. The next prime is 51392659. The reversal of 51392638 is 83629315.

It is a junction number, because it is equal to n+sod(n) for n = 51392597 and 51392606.

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 11 ways as a sum of consecutive naturals, for example, 224308 + ... + 224536.

It is an arithmetic number, because the mean of its divisors is an integer number (3554535).

Almost surely, 2^51392638 is an apocalyptic number.

51392638 is a deficient number, since it is larger than the sum of its proper divisors (33916202).

51392638 is a wasteful number, since it uses less digits than its factorization.

51392638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 343 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 51392638 is about 7168.8658796214. The cubic root of 51392638 is about 371.7922250905.

It can be divided in two parts, 5139 and 2638, that added together give a palindrome (7777).

The spelling of 51392638 in words is "fifty-one million, three hundred ninety-two thousand, six hundred thirty-eight".