27973690 has 16 divisors (see below), whose sum is σ = 52089480. Its totient is φ = 10803520.

The previous prime is 27973657. The next prime is 27973691. The reversal of 27973690 is 9637972.

It can be written as a sum of positive squares in 4 ways, for example, as 27573001 + 400689 = 5251^2 + 633^2 .

It is a super-2 number, since 2×27973690² = 1565054664432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27973691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47941 + ... + 48520.

Almost surely, 2^27973690 is an apocalyptic number.

27973690 is a deficient number, since it is larger than the sum of its proper divisors (24115790).

27973690 is a wasteful number, since it uses less digits than its factorization.

27973690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96497.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 27973690 is about 5289.0159765310. The cubic root of 27973690 is about 303.5637570775.

The spelling of 27973690 in words is "twenty-seven million, nine hundred seventy-three thousand, six hundred ninety".