23210140 has 24 divisors (see below), whose sum is σ = 49471632. Its totient is φ = 9144960.

The previous prime is 23210111. The next prime is 23210149. The reversal of 23210140 is 4101232.

It is a self number, because there is not a number n which added to its sum of digits gives 23210140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23210149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7321 + ... + 10000.

It is an arithmetic number, because the mean of its divisors is an integer number (2061318).

Almost surely, 2^23210140 is an apocalyptic number.

23210140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23210140 is an abundant number, since it is smaller than the sum of its proper divisors (26261492).

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

23210140 is a wasteful number, since it uses less digits than its factorization.

23210140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17397 (or 17395 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 23210140 is about 4817.6903179843. The cubic root of 23210140 is about 285.2501753231.

Adding to 23210140 its reverse (4101232), we get a palindrome (27311372).

The spelling of 23210140 in words is "twenty-three million, two hundred ten thousand, one hundred forty".