28637472 has 24 divisors (see below), whose sum is σ = 75173616. Its totient is φ = 9545792.

The previous prime is 28637467. The next prime is 28637473. The reversal of 28637472 is 27473682.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 28637472.

It is not an unprimeable number, because it can be changed into a prime (28637473) 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, 149058 + ... + 149249.

It is an arithmetic number, because the mean of its divisors is an integer number (3132234).

Almost surely, 2^28637472 is an apocalyptic number.

It is an amenable number.

28637472 is an abundant number, since it is smaller than the sum of its proper divisors (46536144).

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

28637472 is a wasteful number, since it uses less digits than its factorization.

28637472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298320 (or 298312 counting only the distinct ones).

The product of its digits is 112896, while the sum is 39.

The square root of 28637472 is about 5351.3990694023. The cubic root of 28637472 is about 305.9460796102.

The spelling of 28637472 in words is "twenty-eight million, six hundred thirty-seven thousand, four hundred seventy-two".