27770440 has 16 divisors (see below), whose sum is σ = 62483580. Its totient is φ = 11108160.

The previous prime is 27770417. The next prime is 27770447. The reversal of 27770440 is 4407772.

It can be written as a sum of positive squares in 2 ways, for example, as 27688644 + 81796 = 5262^2 + 286^2 .

It is not an unprimeable number, because it can be changed into a prime (27770447) 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, 347091 + ... + 347170.

Almost surely, 2^27770440 is an apocalyptic number.

27770440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27770440 is an abundant number, since it is smaller than the sum of its proper divisors (34713140).

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

27770440 is a wasteful number, since it uses less digits than its factorization.

27770440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694272 (or 694268 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 31.

The square root of 27770440 is about 5269.7665982470. The cubic root of 27770440 is about 302.8267625360.

The spelling of 27770440 in words is "twenty-seven million, seven hundred seventy thousand, four hundred forty".