28204156 has 12 divisors (see below), whose sum is σ = 52260768. Its totient is φ = 13272512.

The previous prime is 28204123. The next prime is 28204157. The reversal of 28204156 is 65140282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28204157) 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, 207316 + ... + 207451.

It is an arithmetic number, because the mean of its divisors is an integer number (4355064).

Almost surely, 2^28204156 is an apocalyptic number.

It is an amenable number.

28204156 is a deficient number, since it is larger than the sum of its proper divisors (24056612).

28204156 is a wasteful number, since it uses less digits than its factorization.

28204156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414788 (or 414786 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28204156 is about 5310.7585145627. The cubic root of 28204156 is about 304.3951319700.

The spelling of 28204156 in words is "twenty-eight million, two hundred four thousand, one hundred fifty-six".