27923440 has 20 divisors (see below), whose sum is σ = 64922184. Its totient is φ = 11169344.

The previous prime is 27923431. The next prime is 27923447. The reversal of 27923440 is 4432972.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27923447) 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, 174442 + ... + 174601.

Almost surely, 2^27923440 is an apocalyptic number.

27923440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27923440 is an abundant number, since it is smaller than the sum of its proper divisors (36998744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27923440 is a wasteful number, since it uses less digits than its factorization.

27923440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349056 (or 349050 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 27923440 is about 5284.2634302237. The cubic root of 27923440 is about 303.3818811588.

The spelling of 27923440 in words is "twenty-seven million, nine hundred twenty-three thousand, four hundred forty".