27791401 has 6 divisors (see below), whose sum is σ = 30547706. Its totient is φ = 25264800.

The previous prime is 27791389. The next prime is 27791411. The reversal of 27791401 is 10419772.

It can be written as a sum of positive squares in only one way, i.e., 26163225 + 1628176 = 5115^2 + 1276^2 .

It is not a de Polignac number, because 27791401 - 2¹³ = 27783209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27791411) 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, 114720 + ... + 114961.

Almost surely, 2^27791401 is an apocalyptic number.

It is an amenable number.

27791401 is a deficient number, since it is larger than the sum of its proper divisors (2756305).

27791401 is a wasteful number, since it uses less digits than its factorization.

27791401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229703 (or 229692 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 27791401 is about 5271.7550208635. The cubic root of 27791401 is about 302.9029341223.

The spelling of 27791401 in words is "twenty-seven million, seven hundred ninety-one thousand, four hundred one".