27700345 has 4 divisors (see below), whose sum is σ = 33240420. Its totient is φ = 22160272.

The previous prime is 27700333. The next prime is 27700369. The reversal of 27700345 is 54300772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8934121 + 18766224 = 2989^2 + 4332^2 .

It is a cyclic number.

It is not a de Polignac number, because 27700345 - 2⁵ = 27700313 is a prime.

It is a super-2 number, since 2×27700345² = 1534618226238050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2770030 + ... + 2770039.

It is an arithmetic number, because the mean of its divisors is an integer number (8310105).

Almost surely, 2^27700345 is an apocalyptic number.

It is an amenable number.

27700345 is a deficient number, since it is larger than the sum of its proper divisors (5540075).

27700345 is an equidigital number, since it uses as much as digits as its factorization.

27700345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5540074.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 27700345 is about 5263.1117221659. Note that the first 3 decimals coincide. The cubic root of 27700345 is about 302.5717608591.

The spelling of 27700345 in words is "twenty-seven million, seven hundred thousand, three hundred forty-five".