27904149 has 64 divisors (see below), whose sum is σ = 52308480. Its totient is φ = 14307840.

The previous prime is 27904147. The next prime is 27904159. The reversal of 27904149 is 94140972.

It is not a de Polignac number, because 27904149 - 2¹ = 27904147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27904147) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 100599 + ... + 100875.

It is an arithmetic number, because the mean of its divisors is an integer number (817320).

Almost surely, 2^27904149 is an apocalyptic number.

It is an amenable number.

27904149 is a deficient number, since it is larger than the sum of its proper divisors (24404331).

27904149 is a wasteful number, since it uses less digits than its factorization.

27904149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 27904149 is about 5282.4377895059. The cubic root of 27904149 is about 303.3120009418.

Adding to 27904149 its sum of digits (36), we get a triangular number (27904185 = T₇₄₇₀).

The spelling of 27904149 in words is "twenty-seven million, nine hundred four thousand, one hundred forty-nine".