27768402 has 12 divisors (see below), whose sum is σ = 60164910. Its totient is φ = 9256128.

The previous prime is 27768401. The next prime is 27768407. The reversal of 27768402 is 20486772.

It can be written as a sum of positive squares in only one way, i.e., 19000881 + 8767521 = 4359^2 + 2961^2 .

It is not an unprimeable number, because it can be changed into a prime (27768401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 771327 + ... + 771362.

Almost surely, 2^27768402 is an apocalyptic number.

27768402 is an abundant number, since it is smaller than the sum of its proper divisors (32396508).

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

27768402 is a wasteful number, since it uses less digits than its factorization.

27768402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542697 (or 1542694 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 27768402 is about 5269.5732275014. The cubic root of 27768402 is about 302.8193544666.

The spelling of 27768402 in words is "twenty-seven million, seven hundred sixty-eight thousand, four hundred two".