23985390 has 64 divisors (see below), whose sum is σ = 67640832. Its totient is φ = 5366400.

The previous prime is 23985373. The next prime is 23985431. The reversal of 23985390 is 9358932.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1495 + ... + 7085.

It is an arithmetic number, because the mean of its divisors is an integer number (1056888).

Almost surely, 2^23985390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23985390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33820416).

23985390 is an abundant number, since it is smaller than the sum of its proper divisors (43655442).

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

23985390 is a wasteful number, since it uses less digits than its factorization.

23985390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5625.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 23985390 is about 4897.4881316855. The cubic root of 23985390 is about 288.3913708854.

The spelling of 23985390 in words is "twenty-three million, nine hundred eighty-five thousand, three hundred ninety".