27742409 has 8 divisors (see below), whose sum is σ = 28220640. Its totient is φ = 27266976.

The previous prime is 27742397. The next prime is 27742417. The reversal of 27742409 is 90424772.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27742409 - 2⁸ = 27742153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27741409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30134 + ... + 31040.

It is an arithmetic number, because the mean of its divisors is an integer number (3527580).

Almost surely, 2^27742409 is an apocalyptic number.

It is an amenable number.

27742409 is a deficient number, since it is larger than the sum of its proper divisors (478231).

27742409 is an equidigital number, since it uses as much as digits as its factorization.

27742409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 27742409 is about 5267.1063213115. The cubic root of 27742409 is about 302.7248388761.

The spelling of 27742409 in words is "twenty-seven million, seven hundred forty-two thousand, four hundred nine".