27400717 has 4 divisors (see below), whose sum is σ = 28842880. Its totient is φ = 25958556.

The previous prime is 27400699. The next prime is 27400727. The reversal of 27400717 is 71700472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27400717 is a prime.

It is a super-2 number, since 2×27400717² = 1501598584228178, 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 (27400727) 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, 721053 + ... + 721090.

It is an arithmetic number, because the mean of its divisors is an integer number (7210720).

Almost surely, 2^27400717 is an apocalyptic number.

It is an amenable number.

27400717 is a deficient number, since it is larger than the sum of its proper divisors (1442163).

27400717 is a wasteful number, since it uses less digits than its factorization.

27400717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442162.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 27400717 is about 5234.5694187774. The cubic root of 27400717 is about 301.4768547734.

The spelling of 27400717 in words is "twenty-seven million, four hundred thousand, seven hundred seventeen".