23398290 has 96 divisors (see below), whose sum is σ = 66162096. Its totient is φ = 5713920.

The previous prime is 23398289. The next prime is 23398327. The reversal of 23398290 is 9289332.

It can be written as a sum of positive squares in 8 ways, for example, as 7502121 + 15896169 = 2739^2 + 3987^2 .

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

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 47 ways as a sum of consecutive naturals, for example, 62544 + ... + 62916.

Almost surely, 2^23398290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23398290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33081048).

23398290 is an abundant number, since it is smaller than the sum of its proper divisors (42763806).

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

23398290 is a wasteful number, since it uses less digits than its factorization.

23398290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 23398290 is about 4837.1778962531. The cubic root of 23398290 is about 286.0188831322.

The spelling of 23398290 in words is "twenty-three million, three hundred ninety-eight thousand, two hundred ninety".