51384480 has 192 divisors, whose sum is σ = 190003968. Its totient is φ = 11427840.

The previous prime is 51384479. The next prime is 51384499. The reversal of 51384480 is 8448315.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137574 + ... + 137946.

It is an arithmetic number, because the mean of its divisors is an integer number (989604).

Almost surely, 2^51384480 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 51384480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95001984).

51384480 is an abundant number, since it is smaller than the sum of its proper divisors (138619488).

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

51384480 is a wasteful number, since it uses less digits than its factorization.

51384480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 51384480 is about 7168.2968688525. The cubic root of 51384480 is about 371.7725514460.

The spelling of 51384480 in words is "fifty-one million, three hundred eighty-four thousand, four hundred eighty".