51906728 has 32 divisors (see below), whose sum is σ = 99070560. Its totient is φ = 25492800.

The previous prime is 51906707. The next prime is 51906787. The reversal of 51906728 is 82760915.

It is a junction number, because it is equal to n+sod(n) for n = 51906691 and 51906700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183275 + ... + 183557.

It is an arithmetic number, because the mean of its divisors is an integer number (3095955).

Almost surely, 2^51906728 is an apocalyptic number.

It is an amenable number.

51906728 is a deficient number, since it is larger than the sum of its proper divisors (47163832).

51906728 is a wasteful number, since it uses less digits than its factorization.

51906728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 51906728 is about 7204.6323986724. The cubic root of 51906728 is about 373.0278162333.

The spelling of 51906728 in words is "fifty-one million, nine hundred six thousand, seven hundred twenty-eight".