27996816 has 20 divisors (see below), whose sum is σ = 72325232. Its totient is φ = 9332256.

The previous prime is 27996799. The next prime is 27996817. The reversal of 27996816 is 61869972.

It is a super-2 number, since 2×27996816² = 1567643412275712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 583267 = 27996816 / (2 + 7 + 9 + 9 + 6 + 8 + 1 + 6).

It is not an unprimeable number, because it can be changed into a prime (27996817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291586 + ... + 291681.

Almost surely, 2^27996816 is an apocalyptic number.

It is an amenable number.

27996816 is an abundant number, since it is smaller than the sum of its proper divisors (44328416).

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

27996816 is a wasteful number, since it uses less digits than its factorization.

27996816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583278 (or 583272 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 27996816 is about 5291.2017538552. The cubic root of 27996816 is about 303.6473866331.

The spelling of 27996816 in words is "twenty-seven million, nine hundred ninety-six thousand, eight hundred sixteen".