23030640 has 120 divisors (see below), whose sum is σ = 80084160. Its totient is φ = 5924352.

The previous prime is 23030639. The next prime is 23030653. The reversal of 23030640 is 4603032.

23030640 is a `hidden beast` number, since 23 + 0 + 3 + 0 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20329 + ... + 21431.

It is an arithmetic number, because the mean of its divisors is an integer number (667368).

Almost surely, 2^23030640 is an apocalyptic number.

23030640 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 23030640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40042080).

23030640 is an abundant number, since it is smaller than the sum of its proper divisors (57053520).

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

23030640 is a wasteful number, since it uses less digits than its factorization.

23030640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 23030640 is about 4799.0249009564. The cubic root of 23030640 is about 284.5129261292.

Adding to 23030640 its reverse (4603032), we get a palindrome (27633672).

The spelling of 23030640 in words is "twenty-three million, thirty thousand, six hundred forty".