51818328 has 24 divisors (see below), whose sum is σ = 140341500. Its totient is φ = 17272752.

The previous prime is 51818293. The next prime is 51818357. The reversal of 51818328 is 82381815.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a junction number, because it is equal to n+sod(n) for n = 51818292 and 51818301.

It is a congruent number.

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, 359778 + ... + 359921.

Almost surely, 2^51818328 is an apocalyptic number.

It is an amenable number.

51818328 is an abundant number, since it is smaller than the sum of its proper divisors (88523172).

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

51818328 is a wasteful number, since it uses less digits than its factorization.

51818328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719711 (or 719704 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 51818328 is about 7198.4948426737. The cubic root of 51818328 is about 372.8159336396.

The spelling of 51818328 in words is "fifty-one million, eight hundred eighteen thousand, three hundred twenty-eight".