27380831 has 4 divisors (see below), whose sum is σ = 27400464. Its totient is φ = 27361200.

The previous prime is 27380813. The next prime is 27380839. The reversal of 27380831 is 13808372.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27380831 is a prime.

It is a super-2 number, since 2×27380831² = 1499419812501122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27380839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7550 + ... + 10571.

It is an arithmetic number, because the mean of its divisors is an integer number (6850116).

It is a Poulet number, since it divides 2^27380830-1.

Almost surely, 2^27380831 is an apocalyptic number.

27380831 is a deficient number, since it is larger than the sum of its proper divisors (19633).

27380831 is a wasteful number, since it uses less digits than its factorization.

27380831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19632.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 27380831 is about 5232.6695863584. The cubic root of 27380831 is about 301.4039051051.

The spelling of 27380831 in words is "twenty-seven million, three hundred eighty thousand, eight hundred thirty-one".