27999345 has 16 divisors (see below), whose sum is σ = 48871872. Its totient is φ = 13575360.

The previous prime is 27999337. The next prime is 27999353. The reversal of 27999345 is 54399972.

It is an interprime number because it is at equal distance from previous prime (27999337) and next prime (27999353).

It is not a de Polignac number, because 27999345 - 2³ = 27999337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27999294 and 27999303.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84682 + ... + 85011.

It is an arithmetic number, because the mean of its divisors is an integer number (3054492).

Almost surely, 2^27999345 is an apocalyptic number.

It is an amenable number.

27999345 is a deficient number, since it is larger than the sum of its proper divisors (20872527).

27999345 is a wasteful number, since it uses less digits than its factorization.

27999345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169712.

The product of its digits is 612360, while the sum is 48.

The square root of 27999345 is about 5291.4407300848. The cubic root of 27999345 is about 303.6565293527.

The spelling of 27999345 in words is "twenty-seven million, nine hundred ninety-nine thousand, three hundred forty-five".