27793788 has 48 divisors (see below), whose sum is σ = 71124480. Its totient is φ = 8377600.

The previous prime is 27793769. The next prime is 27793813. The reversal of 27793788 is 88739772.

It is a self number, because there is not a number n which added to its sum of digits gives 27793788.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31108 + ... + 31988.

It is an arithmetic number, because the mean of its divisors is an integer number (1481760).

Almost surely, 2^27793788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27793788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35562240).

27793788 is an abundant number, since it is smaller than the sum of its proper divisors (43330692).

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

27793788 is a wasteful number, since it uses less digits than its factorization.

27793788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1136 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 51.

The square root of 27793788 is about 5271.9814111964. The cubic root of 27793788 is about 302.9116059726.

The spelling of 27793788 in words is "twenty-seven million, seven hundred ninety-three thousand, seven hundred eighty-eight".