28624744 has 8 divisors (see below), whose sum is σ = 53671410. Its totient is φ = 14312368.

The previous prime is 28624741. The next prime is 28624759. The reversal of 28624744 is 44742682.

It can be written as a sum of positive squares in only one way, i.e., 27436644 + 1188100 = 5238^2 + 1090^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28624741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1789039 + ... + 1789054.

Almost surely, 2^28624744 is an apocalyptic number.

It is an amenable number.

28624744 is a deficient number, since it is larger than the sum of its proper divisors (25046666).

28624744 is a wasteful number, since it uses less digits than its factorization.

28624744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578099 (or 3578095 counting only the distinct ones).

The product of its digits is 86016, while the sum is 37.

The square root of 28624744 is about 5350.2097155158. The cubic root of 28624744 is about 305.9007467127.

The spelling of 28624744 in words is "twenty-eight million, six hundred twenty-four thousand, seven hundred forty-four".