28973685 has 32 divisors (see below), whose sum is σ = 51545088. Its totient is φ = 13800960.

The previous prime is 28973671. The next prime is 28973699. The reversal of 28973685 is 58637982.

It is an interprime number because it is at equal distance from previous prime (28973671) and next prime (28973699).

It is not a de Polignac number, because 28973685 - 2⁶ = 28973621 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3649 + ... + 8441.

It is an arithmetic number, because the mean of its divisors is an integer number (1610784).

Almost surely, 2^28973685 is an apocalyptic number.

It is an amenable number.

28973685 is a deficient number, since it is larger than the sum of its proper divisors (22571403).

28973685 is a wasteful number, since it uses less digits than its factorization.

28973685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4845.

The product of its digits is 725760, while the sum is 48.

The square root of 28973685 is about 5382.7209662029. The cubic root of 28973685 is about 307.1387256906.

The spelling of 28973685 in words is "twenty-eight million, nine hundred seventy-three thousand, six hundred eighty-five".