23621040 has 120 divisors (see below), whose sum is σ = 80954640. Its totient is φ = 6170112.

The previous prime is 23621029. The next prime is 23621071. The reversal of 23621040 is 4012632.

It is a happy number.

23621040 is a `hidden beast` number, since 2 + 3 + 621 + 0 + 40 = 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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37851 + ... + 38469.

It is an arithmetic number, because the mean of its divisors is an integer number (674622).

Almost surely, 2^23621040 is an apocalyptic number.

23621040 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 23621040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40477320).

23621040 is an abundant number, since it is smaller than the sum of its proper divisors (57333600).

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

23621040 is a wasteful number, since it uses less digits than its factorization.

23621040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 23621040 is about 4860.1481458902. The cubic root of 23621040 is about 286.9236443349.

Adding to 23621040 its reverse (4012632), we get a palindrome (27633672).

The spelling of 23621040 in words is "twenty-three million, six hundred twenty-one thousand, forty".