27998768 has 20 divisors (see below), whose sum is σ = 61997520. Its totient is φ = 11999424.

The previous prime is 27998767. The next prime is 27998807. The reversal of 27998768 is 86789972.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (27998767) 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, 124883 + ... + 125106.

It is an arithmetic number, because the mean of its divisors is an integer number (3099876).

Almost surely, 2^27998768 is an apocalyptic number.

27998768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27998768 is an abundant number, since it is smaller than the sum of its proper divisors (33998752).

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

27998768 is a wasteful number, since it uses less digits than its factorization.

27998768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250004 (or 249998 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 56.

The square root of 27998768 is about 5291.3862077909. The cubic root of 27998768 is about 303.6544434584.

The spelling of 27998768 in words is "twenty-seven million, nine hundred ninety-eight thousand, seven hundred sixty-eight".