28533724 has 12 divisors (see below), whose sum is σ = 49977648. Its totient is φ = 14254400.

The previous prime is 28533721. The next prime is 28533727. The reversal of 28533724 is 42733582.

It is an interprime number because it is at equal distance from previous prime (28533721) and next prime (28533727).

It is a super-4 number, since 4×28533724⁴ (a number of 31 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28533724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28533721) 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, 3684 + ... + 8404.

It is an arithmetic number, because the mean of its divisors is an integer number (4164804).

Almost surely, 2^28533724 is an apocalyptic number.

It is an amenable number.

28533724 is a deficient number, since it is larger than the sum of its proper divisors (21443924).

28533724 is a wasteful number, since it uses less digits than its factorization.

28533724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236 (or 6234 counting only the distinct ones).

The product of its digits is 40320, while the sum is 34.

The square root of 28533724 is about 5341.6967341847. The cubic root of 28533724 is about 305.5761714697.

The spelling of 28533724 in words is "twenty-eight million, five hundred thirty-three thousand, seven hundred twenty-four".