28572084 has 18 divisors (see below), whose sum is σ = 72223970. Its totient is φ = 9524016.

The previous prime is 28572077. The next prime is 28572109. The reversal of 28572084 is 48027582.

It is a happy number.

28572084 is a `hidden beast` number, since 2 + 8 + 572 + 0 + 84 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26749584 + 1822500 = 5172^2 + 1350^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 793669 = 28572084 / (2 + 8 + 5 + 7 + 2 + 0 + 8 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 396799 + ... + 396870.

Almost surely, 2^28572084 is an apocalyptic number.

It is an amenable number.

28572084 is an abundant number, since it is smaller than the sum of its proper divisors (43651886).

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

28572084 is a wasteful number, since it uses less digits than its factorization.

28572084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793679 (or 793674 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28572084 is about 5345.2861476258. The cubic root of 28572084 is about 305.7130463829.

The spelling of 28572084 in words is "twenty-eight million, five hundred seventy-two thousand, eighty-four".