51392880 has 400 divisors, whose sum is σ = 224699904. Its totient is φ = 10575360.

The previous prime is 51392863. The next prime is 51392893. The reversal of 51392880 is 8829315.

It is a super-2 number, since 2×51392880² = 5282456229388800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 498909 + ... + 499011.

Almost surely, 2^51392880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51392880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112349952).

51392880 is an abundant number, since it is smaller than the sum of its proper divisors (173307024).

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

51392880 is a wasteful number, since it uses less digits than its factorization.

51392880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 51392880 is about 7168.8827581430. The cubic root of 51392880 is about 371.7928086604.

The spelling of 51392880 in words is "fifty-one million, three hundred ninety-two thousand, eight hundred eighty".