27720404 has 24 divisors (see below), whose sum is σ = 53139240. Its totient is φ = 12594176.

The previous prime is 27720401. The next prime is 27720409. The reversal of 27720404 is 40402772.

It can be written as a sum of positive squares in 4 ways, for example, as 1690000 + 26030404 = 1300^2 + 5102^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27720401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5057 + ... + 9000.

It is an arithmetic number, because the mean of its divisors is an integer number (2214135).

Almost surely, 2^27720404 is an apocalyptic number.

It is an amenable number.

27720404 is a deficient number, since it is larger than the sum of its proper divisors (25418836).

27720404 is a wasteful number, since it uses less digits than its factorization.

27720404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14107 (or 14105 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 27720404 is about 5265.0169990229. The cubic root of 27720404 is about 302.6447782714.

The spelling of 27720404 in words is "twenty-seven million, seven hundred twenty thousand, four hundred four".