28166502 has 64 divisors (see below), whose sum is σ = 70318080. Its totient is φ = 7323264.

The previous prime is 28166497. The next prime is 28166503. The reversal of 28166502 is 20566182.

It is a self number, because there is not a number n which added to its sum of digits gives 28166502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28166503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42808 + ... + 43460.

It is an arithmetic number, because the mean of its divisors is an integer number (1098720).

Almost surely, 2^28166502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28166502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35159040).

28166502 is an abundant number, since it is smaller than the sum of its proper divisors (42151578).

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

28166502 is a wasteful number, since it uses less digits than its factorization.

28166502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28166502 is about 5307.2122625725. The cubic root of 28166502 is about 304.2596105863.

The spelling of 28166502 in words is "twenty-eight million, one hundred sixty-six thousand, five hundred two".