28372284 has 36 divisors (see below), whose sum is σ = 71890000. Its totient is φ = 9434880.

The previous prime is 28372283. The next prime is 28372291. The reversal of 28372284 is 48227382.

28372284 is a `hidden beast` number, since 2 + 8 + 372 + 284 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28372283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22092 + ... + 23340.

Almost surely, 2^28372284 is an apocalyptic number.

It is an amenable number.

28372284 is an abundant number, since it is smaller than the sum of its proper divisors (43517716).

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

28372284 is a wasteful number, since it uses less digits than its factorization.

28372284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 1885 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 28372284 is about 5326.5639956730. The cubic root of 28372284 is about 304.9987781013.

The spelling of 28372284 in words is "twenty-eight million, three hundred seventy-two thousand, two hundred eighty-four".