23022140 has 48 divisors (see below), whose sum is σ = 50676192. Its totient is φ = 8775936.

The previous prime is 23022137. The next prime is 23022161. The reversal of 23022140 is 4122032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38927 + ... + 39513.

It is an arithmetic number, because the mean of its divisors is an integer number (1055754).

Almost surely, 2^23022140 is an apocalyptic number.

23022140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23022140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25338096).

23022140 is an abundant number, since it is smaller than the sum of its proper divisors (27654052).

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

23022140 is a wasteful number, since it uses less digits than its factorization.

23022140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 23022140 is about 4798.1392226570. The cubic root of 23022140 is about 284.4779197573.

Adding to 23022140 its reverse (4122032), we get a palindrome (27144172).

The spelling of 23022140 in words is "twenty-three million, twenty-two thousand, one hundred forty".