28164612 has 72 divisors (see below), whose sum is σ = 80502240. Its totient is φ = 7620480.

The previous prime is 28164599. The next prime is 28164637. The reversal of 28164612 is 21646182.

It is a super-2 number, since 2×28164612² = 1586490738221088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28164612.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9912 + ... + 12432.

Almost surely, 2^28164612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28164612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40251120).

28164612 is an abundant number, since it is smaller than the sum of its proper divisors (52337628).

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

28164612 is a wasteful number, since it uses less digits than its factorization.

28164612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561 (or 2552 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 28164612 is about 5307.0342000029. The cubic root of 28164612 is about 304.2528050610.

The spelling of 28164612 in words is "twenty-eight million, one hundred sixty-four thousand, six hundred twelve".