27994405 has 8 divisors (see below), whose sum is σ = 34053912. Its totient is φ = 22088448.

The previous prime is 27994403. The next prime is 27994411. The reversal of 27994405 is 50449972.

It can be written as a sum of positive squares in 4 ways, for example, as 1790244 + 26204161 = 1338^2 + 5119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27994405 - 2¹ = 27994403 is a prime.

It is a super-2 number, since 2×27994405² = 1567373422608050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27994403) 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, 37984 + ... + 38713.

It is an arithmetic number, because the mean of its divisors is an integer number (4256739).

Almost surely, 2^27994405 is an apocalyptic number.

It is an amenable number.

27994405 is a deficient number, since it is larger than the sum of its proper divisors (6059507).

27994405 is an equidigital number, since it uses as much as digits as its factorization.

27994405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76775.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 27994405 is about 5290.9739179096. The cubic root of 27994405 is about 303.6386699887.

The spelling of 27994405 in words is "twenty-seven million, nine hundred ninety-four thousand, four hundred five".