27742469 has 4 divisors (see below), whose sum is σ = 28133280. Its totient is φ = 27351660.

The previous prime is 27742447. The next prime is 27742471. The reversal of 27742469 is 96424772.

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-27742469 is a prime.

It is a super-2 number, since 2×27742469² = 1539289172431922, 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 (27742369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195299 + ... + 195440.

It is an arithmetic number, because the mean of its divisors is an integer number (7033320).

Almost surely, 2^27742469 is an apocalyptic number.

It is an amenable number.

27742469 is a deficient number, since it is larger than the sum of its proper divisors (390811).

27742469 is an equidigital number, since it uses as much as digits as its factorization.

27742469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390810.

The product of its digits is 169344, while the sum is 41.

The square root of 27742469 is about 5267.1120170355. The cubic root of 27742469 is about 302.7250571157.

The spelling of 27742469 in words is "twenty-seven million, seven hundred forty-two thousand, four hundred sixty-nine".