23128490 has 64 divisors (see below), whose sum is σ = 53049600. Its totient is φ = 7197120.

The previous prime is 23128489. The next prime is 23128499. The reversal of 23128490 is 9482132.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23128499) 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, 37424 + ... + 38036.

It is an arithmetic number, because the mean of its divisors is an integer number (828900).

Almost surely, 2^23128490 is an apocalyptic number.

23128490 is an abundant number, since it is smaller than the sum of its proper divisors (29921110).

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

23128490 is a wasteful number, since it uses less digits than its factorization.

23128490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 23128490 is about 4809.2088746487. The cubic root of 23128490 is about 284.9152923593.

The spelling of 23128490 in words is "twenty-three million, one hundred twenty-eight thousand, four hundred ninety".