51394608 has 80 divisors (see below), whose sum is σ = 148403200. Its totient is φ = 17029440.

The previous prime is 51394579. The next prime is 51394613. The reversal of 51394608 is 80649315.

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 15 ways as a sum of consecutive naturals, for example, 116853 + ... + 117291.

It is an arithmetic number, because the mean of its divisors is an integer number (1855040).

Almost surely, 2^51394608 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 51394608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74201600).

51394608 is an abundant number, since it is smaller than the sum of its proper divisors (97008592).

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

51394608 is a wasteful number, since it uses less digits than its factorization.

51394608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 51394608 is about 7169.0032780018. The cubic root of 51394608 is about 371.7969755850.

The spelling of 51394608 in words is "fifty-one million, three hundred ninety-four thousand, six hundred eight".