28404984 has 16 divisors (see below), whose sum is σ = 71012520. Its totient is φ = 9468320.

The previous prime is 28404919. The next prime is 28404989. The reversal of 28404984 is 48940482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28404989) 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, 591747 + ... + 591794.

Almost surely, 2^28404984 is an apocalyptic number.

28404984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28404984 is an abundant number, since it is smaller than the sum of its proper divisors (42607536).

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

28404984 is a wasteful number, since it uses less digits than its factorization.

28404984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183550 (or 1183546 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 28404984 is about 5329.6326327431. The cubic root of 28404984 is about 305.1159068565.

The spelling of 28404984 in words is "twenty-eight million, four hundred four thousand, nine hundred eighty-four".