28287624 has 64 divisors (see below), whose sum is σ = 73751040. Its totient is φ = 9031680.

The previous prime is 28287619. The next prime is 28287641. The reversal of 28287624 is 42678282.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143494 + ... + 143690.

It is an arithmetic number, because the mean of its divisors is an integer number (1152360).

Almost surely, 2^28287624 is an apocalyptic number.

28287624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28287624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36875520).

28287624 is an abundant number, since it is smaller than the sum of its proper divisors (45463416).

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

28287624 is a wasteful number, since it uses less digits than its factorization.

28287624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 426 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 28287624 is about 5318.6110968936. The cubic root of 28287624 is about 304.6951141240.

The spelling of 28287624 in words is "twenty-eight million, two hundred eighty-seven thousand, six hundred twenty-four".