28244788 has 54 divisors (see below), whose sum is σ = 59395938. Its totient is φ = 11674080.

The previous prime is 28244767. The next prime is 28244809. The reversal of 28244788 is 88744282.

It is an interprime number because it is at equal distance from previous prime (28244767) and next prime (28244809).

It can be written as a sum of positive squares in only one way, i.e., 19554084 + 8690704 = 4422^2 + 2948^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 421531 + ... + 421597.

Almost surely, 2^28244788 is an apocalyptic number.

It is an amenable number.

28244788 is an abundant number, since it is smaller than the sum of its proper divisors (31151150).

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

28244788 is a wasteful number, since it uses less digits than its factorization.

28244788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 93 counting only the distinct ones).

The product of its digits is 229376, while the sum is 43.

The square root of 28244788 is about 5314.5825800339. The cubic root of 28244788 is about 304.5412363052.

The spelling of 28244788 in words is "twenty-eight million, two hundred forty-four thousand, seven hundred eighty-eight".