51646828 has 12 divisors (see below), whose sum is σ = 90778240. Its totient is φ = 25710192.

The previous prime is 51646823. The next prime is 51646831. The reversal of 51646828 is 82864615.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51646823) 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, 27276 + ... + 29107.

Almost surely, 2^51646828 is an apocalyptic number.

It is an amenable number.

51646828 is a deficient number, since it is larger than the sum of its proper divisors (39131412).

51646828 is a wasteful number, since it uses less digits than its factorization.

51646828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56616 (or 56614 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 51646828 is about 7186.5727575806. The cubic root of 51646828 is about 372.4041835746.

The spelling of 51646828 in words is "fifty-one million, six hundred forty-six thousand, eight hundred twenty-eight".