51000028 has 24 divisors (see below), whose sum is σ = 94263120. Its totient is φ = 24076800.

The previous prime is 50999999. The next prime is 51000041. The reversal of 51000028 is 82000015.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 50999975 and 51000020.

It is a congruent number.

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, 25878 + ... + 27778.

It is an arithmetic number, because the mean of its divisors is an integer number (3927630).

Almost surely, 2^51000028 is an apocalyptic number.

It is an amenable number.

51000028 is a deficient number, since it is larger than the sum of its proper divisors (43263092).

51000028 is a wasteful number, since it uses less digits than its factorization.

51000028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277 (or 2275 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 51000028 is about 7141.4303889347. The cubic root of 51000028 is about 370.8430447933.

The spelling of 51000028 in words is "fifty-one million, twenty-eight", and thus it is an aban number and an uban number.