27745031 has 6 divisors (see below), whose sum is σ = 28669896. Its totient is φ = 26849100.

The previous prime is 27745021. The next prime is 27745051. The reversal of 27745031 is 13054772.

It is not a de Polignac number, because 27745031 - 2¹⁴ = 27728647 is a prime.

It is a super-2 number, since 2×27745031² = 1539573490381922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27744985 and 27745003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27745021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13475 + ... + 15396.

It is an arithmetic number, because the mean of its divisors is an integer number (4778316).

Almost surely, 2^27745031 is an apocalyptic number.

27745031 is a deficient number, since it is larger than the sum of its proper divisors (924865).

27745031 is an equidigital number, since it uses as much as digits as its factorization.

27745031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28933 (or 28902 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 27745031 is about 5267.3552187032. The cubic root of 27745031 is about 302.7343756533.

The spelling of 27745031 in words is "twenty-seven million, seven hundred forty-five thousand, thirty-one".