28521020252 has 12 divisors (see below), whose sum is σ = 49913211600. Its totient is φ = 14260102656.

The previous prime is 28521020243. The next prime is 28521020261. The reversal of 28521020252 is 25202012582.

It is an interprime number because it is at equal distance from previous prime (28521020243) and next prime (28521020261).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100124 + ... + 258972.

It is an arithmetic number, because the mean of its divisors is an integer number (4159434300).

Almost surely, 2^28521020252 is an apocalyptic number.

It is an amenable number.

28521020252 is a deficient number, since it is larger than the sum of its proper divisors (21392191348).

28521020252 is a wasteful number, since it uses less digits than its factorization.

28521020252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203740 (or 203738 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The spelling of 28521020252 in words is "twenty-eight billion, five hundred twenty-one million, twenty thousand, two hundred fifty-two".