28904859 has 24 divisors (see below), whose sum is σ = 44508672. Its totient is φ = 18033840.

The previous prime is 28904849. The next prime is 28904891. The reversal of 28904859 is 95840982.

It is not a de Polignac number, because 28904859 - 2⁷ = 28904731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28904809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8244 + ... + 11214.

It is an arithmetic number, because the mean of its divisors is an integer number (1854528).

Almost surely, 2^28904859 is an apocalyptic number.

28904859 is a deficient number, since it is larger than the sum of its proper divisors (15603813).

28904859 is a wasteful number, since it uses less digits than its factorization.

28904859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047 (or 3044 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 28904859 is about 5376.3239299730. The cubic root of 28904859 is about 306.8953336784.

The spelling of 28904859 in words is "twenty-eight million, nine hundred four thousand, eight hundred fifty-nine".