23278164 has 48 divisors (see below), whose sum is σ = 66853248. Its totient is φ = 6139008.

The previous prime is 23278159. The next prime is 23278181. The reversal of 23278164 is 46187232.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9567 + ... + 11750.

It is an arithmetic number, because the mean of its divisors is an integer number (1392776).

Almost surely, 2^23278164 is an apocalyptic number.

It is an amenable number.

23278164 is an abundant number, since it is smaller than the sum of its proper divisors (43575084).

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

23278164 is a wasteful number, since it uses less digits than its factorization.

23278164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21344 (or 21342 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 23278164 is about 4824.7449673532. The cubic root of 23278164 is about 285.5285727898.

The spelling of 23278164 in words is "twenty-three million, two hundred seventy-eight thousand, one hundred sixty-four".