28345902 has 32 divisors (see below), whose sum is σ = 64647072. Its totient is φ = 8208384.

The previous prime is 28345897. The next prime is 28345927. The reversal of 28345902 is 20954382.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9363 + ... + 12014.

It is an arithmetic number, because the mean of its divisors is an integer number (2020221).

Almost surely, 2^28345902 is an apocalyptic number.

28345902 is an abundant number, since it is smaller than the sum of its proper divisors (36301170).

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

28345902 is a wasteful number, since it uses less digits than its factorization.

28345902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21412.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 28345902 is about 5324.0869639780. The cubic root of 28345902 is about 304.9042143003.

The spelling of 28345902 in words is "twenty-eight million, three hundred forty-five thousand, nine hundred two".