51408288 has 36 divisors (see below), whose sum is σ = 146193138. Its totient is φ = 17136000.

The previous prime is 51408277. The next prime is 51408337. The reversal of 51408288 is 88280415.

It can be written as a sum of positive squares in only one way, i.e., 44997264 + 6411024 = 6708^2 + 2532^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88963 + ... + 89538.

Almost surely, 2^51408288 is an apocalyptic number.

It is an amenable number.

51408288 is an abundant number, since it is smaller than the sum of its proper divisors (94784850).

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

51408288 is a wasteful number, since it uses less digits than its factorization.

51408288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178517 (or 178506 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 51408288 is about 7169.9573220487. The cubic root of 51408288 is about 371.8299604422.

The spelling of 51408288 in words is "fifty-one million, four hundred eight thousand, two hundred eighty-eight".