28552350621 has 8 divisors (see below), whose sum is σ = 38070772384. Its totient is φ = 19034414640.

The previous prime is 28552350613. The next prime is 28552350623. The reversal of 28552350621 is 12605325582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28552350621 - 2³ = 28552350613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28552350621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28552350623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50466 + ... + 244236.

It is an arithmetic number, because the mean of its divisors is an integer number (4758846548).

Almost surely, 2^28552350621 is an apocalyptic number.

It is an amenable number.

28552350621 is a deficient number, since it is larger than the sum of its proper divisors (9518421763).

28552350621 is a wasteful number, since it uses less digits than its factorization.

28552350621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242891.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 28552350621 in words is "twenty-eight billion, five hundred fifty-two million, three hundred fifty thousand, six hundred twenty-one".