52021928 has 24 divisors (see below), whose sum is σ = 113467050. Its totient is φ = 22294944.

The previous prime is 52021927. The next prime is 52021951. The reversal of 52021928 is 82912025.

It can be written as a sum of positive squares in only one way, i.e., 38464804 + 13557124 = 6202^2 + 3682^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 52021928.

It is not an unprimeable number, because it can be changed into a prime (52021927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65963 + ... + 66746.

Almost surely, 2^52021928 is an apocalyptic number.

It is an amenable number.

52021928 is an abundant number, since it is smaller than the sum of its proper divisors (61445122).

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

52021928 is a wasteful number, since it uses less digits than its factorization.

52021928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132729 (or 132718 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 52021928 is about 7212.6228239109. The cubic root of 52021928 is about 373.3035740168.

The spelling of 52021928 in words is "fifty-two million, twenty-one thousand, nine hundred twenty-eight".