27764421 has 16 divisors (see below), whose sum is σ = 38646720. Its totient is φ = 17713280.

The previous prime is 27764411. The next prime is 27764449. The reversal of 27764421 is 12446772.

It is a cyclic number.

It is not a de Polignac number, because 27764421 - 2⁵ = 27764389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27764411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4390 + ... + 8648.

It is an arithmetic number, because the mean of its divisors is an integer number (2415420).

Almost surely, 2^27764421 is an apocalyptic number.

It is an amenable number.

27764421 is a deficient number, since it is larger than the sum of its proper divisors (10882299).

27764421 is a wasteful number, since it uses less digits than its factorization.

27764421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356.

The product of its digits is 18816, while the sum is 33.

The square root of 27764421 is about 5269.1954793877. The cubic root of 27764421 is about 302.8048826044.

The spelling of 27764421 in words is "twenty-seven million, seven hundred sixty-four thousand, four hundred twenty-one".