27938749 has 4 divisors (see below), whose sum is σ = 27963936. Its totient is φ = 27913564.

The previous prime is 27938747. The next prime is 27938761. The reversal of 27938749 is 94783972.

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 not a de Polignac number, because 27938749 - 2¹ = 27938747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27938741) 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, 10849 + ... + 13174.

It is an arithmetic number, because the mean of its divisors is an integer number (6990984).

Almost surely, 2^27938749 is an apocalyptic number.

It is an amenable number.

27938749 is a deficient number, since it is larger than the sum of its proper divisors (25187).

27938749 is a wasteful number, since it uses less digits than its factorization.

27938749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25186.

The product of its digits is 762048, while the sum is 49.

The square root of 27938749 is about 5285.7117779917. The cubic root of 27938749 is about 303.4373139744.

The spelling of 27938749 in words is "twenty-seven million, nine hundred thirty-eight thousand, seven hundred forty-nine".