23278446 has 12 divisors (see below), whose sum is σ = 50436672. Its totient is φ = 7759476.

The previous prime is 23278441. The next prime is 23278471. The reversal of 23278446 is 64487232.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 23278446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23278441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 646606 + ... + 646641.

It is an arithmetic number, because the mean of its divisors is an integer number (4203056).

Almost surely, 2^23278446 is an apocalyptic number.

23278446 is an abundant number, since it is smaller than the sum of its proper divisors (27158226).

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

23278446 is a wasteful number, since it uses less digits than its factorization.

23278446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293255 (or 1293252 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 23278446 is about 4824.7741916073. The cubic root of 23278446 is about 285.5297257836.

The spelling of 23278446 in words is "twenty-three million, two hundred seventy-eight thousand, four hundred forty-six".