28647672 has 16 divisors (see below), whose sum is σ = 71619240. Its totient is φ = 9549216.

The previous prime is 28647667. The next prime is 28647677. The reversal of 28647672 is 27674682.

It is an interprime number because it is at equal distance from previous prime (28647667) and next prime (28647677).

It is a super-2 number, since 2×28647672² = 1641378222039168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28647677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596803 + ... + 596850.

Almost surely, 2^28647672 is an apocalyptic number.

It is an amenable number.

28647672 is an abundant number, since it is smaller than the sum of its proper divisors (42971568).

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

28647672 is a wasteful number, since it uses less digits than its factorization.

28647672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193662 (or 1193658 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 28647672 is about 5352.3520063613. The cubic root of 28647672 is about 305.9823989193.

The spelling of 28647672 in words is "twenty-eight million, six hundred forty-seven thousand, six hundred seventy-two".