28900859 has 24 divisors (see below), whose sum is σ = 33142032. Its totient is φ = 25159680.

The previous prime is 28900841. The next prime is 28900889. The reversal of 28900859 is 95800982.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-28900859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28900829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 297899 + ... + 297995.

It is an arithmetic number, because the mean of its divisors is an integer number (1380918).

Almost surely, 2^28900859 is an apocalyptic number.

28900859 is a deficient number, since it is larger than the sum of its proper divisors (4241173).

28900859 is a wasteful number, since it uses less digits than its factorization.

28900859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 28900859 is about 5375.9519157076. The cubic root of 28900859 is about 306.8811764512.

The spelling of 28900859 in words is "twenty-eight million, nine hundred thousand, eight hundred fifty-nine".