27404145 has 24 divisors (see below), whose sum is σ = 47639592. Its totient is φ = 14572800.

The previous prime is 27404131. The next prime is 27404147. The reversal of 27404145 is 54140472.

It can be written as a sum of positive squares in 4 ways, for example, as 5948721 + 21455424 = 2439^2 + 4632^2 .

It is not a de Polignac number, because 27404145 - 2⁴ = 27404129 is a prime.

It is a super-3 number, since 3×27404145³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (27404147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20085 + ... + 21405.

It is an arithmetic number, because the mean of its divisors is an integer number (1984983).

Almost surely, 2^27404145 is an apocalyptic number.

It is an amenable number.

27404145 is a deficient number, since it is larger than the sum of its proper divisors (20235447).

27404145 is a wasteful number, since it uses less digits than its factorization.

27404145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793 (or 1790 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 27404145 is about 5234.8968471212. The cubic root of 27404145 is about 301.4894264586.

The spelling of 27404145 in words is "twenty-seven million, four hundred four thousand, one hundred forty-five".