51612928 has 36 divisors (see below), whose sum is σ = 105828100. Its totient is φ = 25104384.

The previous prime is 51612907. The next prime is 51612929. The reversal of 51612928 is 82921615.

It can be written as a sum of positive squares in 2 ways, for example, as 25725184 + 25887744 = 5072^2 + 5088^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51612893 and 51612902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51612929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6748 + ... + 12196.

Almost surely, 2^51612928 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 51612928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52914050).

51612928 is an abundant number, since it is smaller than the sum of its proper divisors (54215172).

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

51612928 is an equidigital number, since it uses as much as digits as its factorization.

51612928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5502 (or 5488 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 51612928 is about 7184.2138052817. The cubic root of 51612928 is about 372.3226860559.

The spelling of 51612928 in words is "fifty-one million, six hundred twelve thousand, nine hundred twenty-eight".