28357672 has 24 divisors (see below), whose sum is σ = 61852410. Its totient is φ = 12153120.

The previous prime is 28357663. The next prime is 28357673. The reversal of 28357672 is 27675382.

It can be written as a sum of positive squares in only one way, i.e., 18957316 + 9400356 = 4354^2 + 3066^2 .

It is a super-2 number, since 2×28357672² = 1608315122519168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28357673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35779 + ... + 36562.

Almost surely, 2^28357672 is an apocalyptic number.

It is an amenable number.

28357672 is an abundant number, since it is smaller than the sum of its proper divisors (33494738).

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

28357672 is a wasteful number, since it uses less digits than its factorization.

28357672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72361 (or 72350 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The square root of 28357672 is about 5325.1922031040. The cubic root of 28357672 is about 304.9464100058.

The spelling of 28357672 in words is "twenty-eight million, three hundred fifty-seven thousand, six hundred seventy-two".