28204408 has 8 divisors (see below), whose sum is σ = 52883280. Its totient is φ = 14102200.

The previous prime is 28204391. The next prime is 28204409. The reversal of 28204408 is 80440282.

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 (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28204409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1762768 + ... + 1762783.

It is an arithmetic number, because the mean of its divisors is an integer number (6610410).

Almost surely, 2^28204408 is an apocalyptic number.

It is an amenable number.

28204408 is a deficient number, since it is larger than the sum of its proper divisors (24678872).

28204408 is a wasteful number, since it uses less digits than its factorization.

28204408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525557 (or 3525553 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 28204408 is about 5310.7822399342. The cubic root of 28204408 is about 304.3960385426.

The spelling of 28204408 in words is "twenty-eight million, two hundred four thousand, four hundred eight".