27978232 has 8 divisors (see below), whose sum is σ = 52459200. Its totient is φ = 13989112.

The previous prime is 27978193. The next prime is 27978239. The reversal of 27978232 is 23287972.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27978239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1748632 + ... + 1748647.

It is an arithmetic number, because the mean of its divisors is an integer number (6557400).

Almost surely, 2^27978232 is an apocalyptic number.

It is an amenable number.

27978232 is a deficient number, since it is larger than the sum of its proper divisors (24480968).

27978232 is a wasteful number, since it uses less digits than its factorization.

27978232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497285 (or 3497281 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 27978232 is about 5289.4453395418. The cubic root of 27978232 is about 303.5801857523.

The spelling of 27978232 in words is "twenty-seven million, nine hundred seventy-eight thousand, two hundred thirty-two".