51388628 has 12 divisors (see below), whose sum is σ = 90357792. Its totient is φ = 25572120.

The previous prime is 51388627. The next prime is 51388639. The reversal of 51388628 is 82688315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51388627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29600 + ... + 31287.

It is an arithmetic number, because the mean of its divisors is an integer number (7529816).

Almost surely, 2^51388628 is an apocalyptic number.

It is an amenable number.

51388628 is a deficient number, since it is larger than the sum of its proper divisors (38969164).

51388628 is a wasteful number, since it uses less digits than its factorization.

51388628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61102 (or 61100 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 51388628 is about 7168.5861925487. The cubic root of 51388628 is about 371.7825549273.

The spelling of 51388628 in words is "fifty-one million, three hundred eighty-eight thousand, six hundred twenty-eight".