23475640 has 128 divisors (see below), whose sum is σ = 62208000. Its totient is φ = 7907328.

The previous prime is 23475631. The next prime is 23475707. The reversal of 23475640 is 4657432.

It is a super-2 number, since 2×23475640² = 1102211346819200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297121 + ... + 297199.

It is an arithmetic number, because the mean of its divisors is an integer number (486000).

Almost surely, 2^23475640 is an apocalyptic number.

23475640 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 23475640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31104000).

23475640 is an abundant number, since it is smaller than the sum of its proper divisors (38732360).

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

23475640 is a wasteful number, since it uses less digits than its factorization.

23475640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 23475640 is about 4845.1666638001. The cubic root of 23475640 is about 286.3337099368. Note that the first 3 decimals are identical.

The spelling of 23475640 in words is "twenty-three million, four hundred seventy-five thousand, six hundred forty".