23231490 has 64 divisors (see below), whose sum is σ = 59875200. Its totient is φ = 5750784.

The previous prime is 23231479. The next prime is 23231491. The reversal of 23231490 is 9413232.

It is a self number, because there is not a number n which added to its sum of digits gives 23231490.

It is not an unprimeable number, because it can be changed into a prime (23231491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29826 + ... + 30594.

It is an arithmetic number, because the mean of its divisors is an integer number (935550).

Almost surely, 2^23231490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23231490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29937600).

23231490 is an abundant number, since it is smaller than the sum of its proper divisors (36643710).

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

23231490 is a wasteful number, since it uses less digits than its factorization.

23231490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 23231490 is about 4819.9056007354. The cubic root of 23231490 is about 285.3376116026.

The spelling of 23231490 in words is "twenty-three million, two hundred thirty-one thousand, four hundred ninety".