28408284 has 36 divisors (see below), whose sum is σ = 74288760. Its totient is φ = 9142560.

The previous prime is 28408279. The next prime is 28408297. The reversal of 28408284 is 48280482.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

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, 12562 + ... + 14649.

Almost surely, 2^28408284 is an apocalyptic number.

It is an amenable number.

28408284 is an abundant number, since it is smaller than the sum of its proper divisors (45880476).

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

28408284 is a wasteful number, since it uses less digits than its factorization.

28408284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27250 (or 27245 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The square root of 28408284 is about 5329.9422135704. The cubic root of 28408284 is about 305.1277221950.

The spelling of 28408284 in words is "twenty-eight million, four hundred eight thousand, two hundred eighty-four".