28216624 has 10 divisors (see below), whose sum is σ = 54669740. Its totient is φ = 14108304.

The previous prime is 28216613. The next prime is 28216627. The reversal of 28216624 is 42661282.

It is not an unprimeable number, because it can be changed into a prime (28216627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 881754 + ... + 881785.

It is an arithmetic number, because the mean of its divisors is an integer number (5466974).

Almost surely, 2^28216624 is an apocalyptic number.

It is an amenable number.

28216624 is a deficient number, since it is larger than the sum of its proper divisors (26453116).

28216624 is a wasteful number, since it uses less digits than its factorization.

28216624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763547 (or 1763541 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 28216624 is about 5311.9322284833. The cubic root of 28216624 is about 304.4399792542.

The spelling of 28216624 in words is "twenty-eight million, two hundred sixteen thousand, six hundred twenty-four".