51628572 has 36 divisors (see below), whose sum is σ = 132972840. Its totient is φ = 16884192.

The previous prime is 51628571. The next prime is 51628589. The reversal of 51628572 is 27582615.

It is a happy number.

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

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51628571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11622 + ... + 15437.

It is an arithmetic number, because the mean of its divisors is an integer number (3693690).

Almost surely, 2^51628572 is an apocalyptic number.

It is an amenable number.

51628572 is an abundant number, since it is smaller than the sum of its proper divisors (81344268).

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

51628572 is a wasteful number, since it uses less digits than its factorization.

51628572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27122 (or 27117 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 51628572 is about 7185.3024988514. The cubic root of 51628572 is about 372.3602995501.

The spelling of 51628572 in words is "fifty-one million, six hundred twenty-eight thousand, five hundred seventy-two".