28226646 has 36 divisors (see below), whose sum is σ = 71144892. Its totient is φ = 8064504.

The previous prime is 28226641. The next prime is 28226651. The reversal of 28226646 is 64662282.

28226646 is a `hidden beast` number, since 2 + 8 + 2 + 2 + 6 + 646 = 666.

It is an interprime number because it is at equal distance from previous prime (28226641) and next prime (28226651).

It is a self number, because there is not a number n which added to its sum of digits gives 28226646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28226641) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15120 + ... + 16883.

It is an arithmetic number, because the mean of its divisors is an integer number (1976247).

Almost surely, 2^28226646 is an apocalyptic number.

28226646 is an abundant number, since it is smaller than the sum of its proper divisors (42918246).

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

28226646 is a wasteful number, since it uses less digits than its factorization.

28226646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32025 (or 32015 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 28226646 is about 5312.8754926123. The cubic root of 28226646 is about 304.4760187218.

The spelling of 28226646 in words is "twenty-eight million, two hundred twenty-six thousand, six hundred forty-six".