28556372 has 12 divisors (see below), whose sum is σ = 53817876. Its totient is φ = 13179840.

The previous prime is 28556371. The next prime is 28556383. The reversal of 28556372 is 27365582.

It can be written as a sum of positive squares in 2 ways, for example, as 2709316 + 25847056 = 1646^2 + 5084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28556371) 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, 274529 + ... + 274632.

It is an arithmetic number, because the mean of its divisors is an integer number (4484823).

Almost surely, 2^28556372 is an apocalyptic number.

It is an amenable number.

28556372 is a deficient number, since it is larger than the sum of its proper divisors (25261504).

28556372 is a wasteful number, since it uses less digits than its factorization.

28556372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549178 (or 549176 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 28556372 is about 5343.8162393555. The cubic root of 28556372 is about 305.6569981539.

The spelling of 28556372 in words is "twenty-eight million, five hundred fifty-six thousand, three hundred seventy-two".