27978672 has 40 divisors (see below), whose sum is σ = 75423744. Its totient is φ = 8920384.

The previous prime is 27978661. The next prime is 27978701. The reversal of 27978672 is 27687972.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 11568 + ... + 13775.

Almost surely, 2^27978672 is an apocalyptic number.

It is an amenable number.

27978672 is an abundant number, since it is smaller than the sum of its proper divisors (47445072).

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

27978672 is a wasteful number, since it uses less digits than its factorization.

27978672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25377 (or 25371 counting only the distinct ones).

The product of its digits is 592704, while the sum is 48.

The square root of 27978672 is about 5289.4869316409. The cubic root of 27978672 is about 303.5817771631.

The spelling of 27978672 in words is "twenty-seven million, nine hundred seventy-eight thousand, six hundred seventy-two".