27678992 has 90 divisors (see below), whose sum is σ = 64640394. Its totient is φ = 11432960.

The previous prime is 27678967. The next prime is 27679007. The reversal of 27678992 is 29987672.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7929856 + 19749136 = 2816^2 + 4444^2 .

It is a super-2 number, since 2×27678992² = 1532253196272128, 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 27678992.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 954434 + ... + 954462.

Almost surely, 2^27678992 is an apocalyptic number.

27678992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27678992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32320197).

27678992 is an abundant number, since it is smaller than the sum of its proper divisors (36961402).

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

27678992 is a wasteful number, since it uses less digits than its factorization.

27678992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 59 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 27678992 is about 5261.0827782881. The cubic root of 27678992 is about 302.4939943711.

The spelling of 27678992 in words is "twenty-seven million, six hundred seventy-eight thousand, nine hundred ninety-two".