27961545 has 16 divisors (see below), whose sum is σ = 44847360. Its totient is φ = 14876544.

The previous prime is 27961541. The next prime is 27961553. The reversal of 27961545 is 54516972.

It is not a de Polignac number, because 27961545 - 2² = 27961541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27961541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4816 + ... + 8894.

It is an arithmetic number, because the mean of its divisors is an integer number (2802960).

Almost surely, 2^27961545 is an apocalyptic number.

It is an amenable number.

27961545 is a deficient number, since it is larger than the sum of its proper divisors (16885815).

27961545 is a wasteful number, since it uses less digits than its factorization.

27961545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4544.

The product of its digits is 75600, while the sum is 39.

The square root of 27961545 is about 5287.8677177100. The cubic root of 27961545 is about 303.5198191784.

The spelling of 27961545 in words is "twenty-seven million, nine hundred sixty-one thousand, five hundred forty-five".