51490800 has 90 divisors (see below), whose sum is σ = 178699872. Its totient is φ = 13729920.

The previous prime is 51490799. The next prime is 51490811. The reversal of 51490800 is 809415.

It is a tau number, because it is divible by the number of its divisors (90).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3552 + ... + 10751.

Almost surely, 2^51490800 is an apocalyptic number.

51490800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51490800 is an abundant number, since it is smaller than the sum of its proper divisors (127209072).

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

51490800 is a wasteful number, since it uses less digits than its factorization.

51490800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14327 (or 14313 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 51490800 is about 7175.7090242010. The cubic root of 51490800 is about 372.0287872277.

The spelling of 51490800 in words is "fifty-one million, four hundred ninety thousand, eight hundred".