28940859 has 6 divisors (see below), whose sum is σ = 41803476. Its totient is φ = 19293900.

The previous prime is 28940797. The next prime is 28940881. The reversal of 28940859 is 95804982.

It is not a de Polignac number, because 28940859 - 2⁷ = 28940731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28940459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1607817 + ... + 1607834.

It is an arithmetic number, because the mean of its divisors is an integer number (6967246).

Almost surely, 2^28940859 is an apocalyptic number.

28940859 is a deficient number, since it is larger than the sum of its proper divisors (12862617).

28940859 is a wasteful number, since it uses less digits than its factorization.

28940859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215657 (or 3215654 counting only the distinct ones).

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

The square root of 28940859 is about 5379.6709007150. The cubic root of 28940859 is about 307.0226899872.

The spelling of 28940859 in words is "twenty-eight million, nine hundred forty thousand, eight hundred fifty-nine".