28618806 has 16 divisors (see below), whose sum is σ = 57314304. Its totient is φ = 9526824.

The previous prime is 28618789. The next prime is 28618823. The reversal of 28618806 is 60881682.

It is an interprime number because it is at equal distance from previous prime (28618789) and next prime (28618823).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2415 + ... + 7941.

It is an arithmetic number, because the mean of its divisors is an integer number (3582144).

Almost surely, 2^28618806 is an apocalyptic number.

28618806 is an abundant number, since it is smaller than the sum of its proper divisors (28695498).

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

28618806 is a wasteful number, since it uses less digits than its factorization.

28618806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 28618806 is about 5349.6547552155. The cubic root of 28618806 is about 305.8795929369.

The spelling of 28618806 in words is "twenty-eight million, six hundred eighteen thousand, eight hundred six".