27379945 has 16 divisors (see below), whose sum is σ = 34989840. Its totient is φ = 20496384.

The previous prime is 27379921. The next prime is 27379951. The reversal of 27379945 is 54997372.

It can be written as a sum of positive squares in 8 ways, for example, as 47961 + 27331984 = 219^2 + 5228^2 .

It is a cyclic number.

It is not a de Polignac number, because 27379945 - 2²¹ = 25282793 is a prime.

It is a super-2 number, since 2×27379945² = 1499322776406050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27379895 and 27379904.

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, 15571 + ... + 17239.

It is an arithmetic number, because the mean of its divisors is an integer number (2186865).

Almost surely, 2^27379945 is an apocalyptic number.

It is an amenable number.

27379945 is a deficient number, since it is larger than the sum of its proper divisors (7609895).

27379945 is a wasteful number, since it uses less digits than its factorization.

27379945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884.

The product of its digits is 476280, while the sum is 46.

The square root of 27379945 is about 5232.5849252544. The cubic root of 27379945 is about 301.4006540869.

The spelling of 27379945 in words is "twenty-seven million, three hundred seventy-nine thousand, nine hundred forty-five".