51408860 has 24 divisors (see below), whose sum is σ = 108114720. Its totient is φ = 20533824.

The previous prime is 51408829. The next prime is 51408871. The reversal of 51408860 is 6880415.

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, 16982 + ... + 19778.

It is an arithmetic number, because the mean of its divisors is an integer number (4504780).

Almost surely, 2^51408860 is an apocalyptic number.

It is an amenable number.

51408860 is an abundant number, since it is smaller than the sum of its proper divisors (56705860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51408860 is a wasteful number, since it uses less digits than its factorization.

51408860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3725 (or 3723 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 51408860 is about 7169.9972105992. The cubic root of 51408860 is about 371.8313395062.

The spelling of 51408860 in words is "fifty-one million, four hundred eight thousand, eight hundred sixty".