28404936 has 48 divisors (see below), whose sum is σ = 87921600. Its totient is φ = 8115552.

The previous prime is 28404919. The next prime is 28404989. The reversal of 28404936 is 63940482.

28404936 = T₁₈₃ + T₁₈₄ + ... + T₅₆₀.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28404936.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27676 + ... + 28683.

It is an arithmetic number, because the mean of its divisors is an integer number (1831700).

Almost surely, 2^28404936 is an apocalyptic number.

It is an amenable number.

28404936 is an abundant number, since it is smaller than the sum of its proper divisors (59516664).

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

28404936 is a wasteful number, since it uses less digits than its factorization.

28404936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56378 (or 56371 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 28404936 is about 5329.6281296165. The cubic root of 28404936 is about 305.1157349902.

It can be divided in two parts, 2840 and 4936, that added together give a 5-th power (7776 = 6⁵).

The spelling of 28404936 in words is "twenty-eight million, four hundred four thousand, nine hundred thirty-six".