23278590 has 80 divisors (see below), whose sum is σ = 64817280. Its totient is φ = 5987520.

The previous prime is 23278589. The next prime is 23278601. The reversal of 23278590 is 9587232.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 22995 + ... + 23985.

It is an arithmetic number, because the mean of its divisors is an integer number (810216).

Almost surely, 2^23278590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23278590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32408640).

23278590 is an abundant number, since it is smaller than the sum of its proper divisors (41538690).

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

23278590 is a wasteful number, since it uses less digits than its factorization.

23278590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 23278590 is about 4824.7891145624. The cubic root of 23278590 is about 285.5303145427.

The spelling of 23278590 in words is "twenty-three million, two hundred seventy-eight thousand, five hundred ninety".