23500890 has 108 divisors (see below), whose sum is σ = 72065214. Its totient is φ = 5298048.

The previous prime is 23500877. The next prime is 23500901. The reversal of 23500890 is 9800532.

It can be written as a sum of positive squares in 3 ways, for example, as 20007729 + 3493161 = 4473^2 + 1869^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 321894 + ... + 321966.

Almost surely, 2^23500890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23500890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36032607).

23500890 is an abundant number, since it is smaller than the sum of its proper divisors (48564324).

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

23500890 is a wasteful number, since it uses less digits than its factorization.

23500890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 23500890 is about 4847.7716530381. The cubic root of 23500890 is about 286.4363317126.

The spelling of 23500890 in words is "twenty-three million, five hundred thousand, eight hundred ninety".