23057640 has 96 divisors (see below), whose sum is σ = 78904800. Its totient is φ = 5823360.

The previous prime is 23057633. The next prime is 23057641. The reversal of 23057640 is 4675032.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (23057641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5155 + ... + 8525.

It is an arithmetic number, because the mean of its divisors is an integer number (821925).

Almost surely, 2^23057640 is an apocalyptic number.

23057640 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 23057640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39452400).

23057640 is an abundant number, since it is smaller than the sum of its proper divisors (55847160).

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

23057640 is a wasteful number, since it uses less digits than its factorization.

23057640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 23057640 is about 4801.8371484256. The cubic root of 23057640 is about 284.6240657388.

The spelling of 23057640 in words is "twenty-three million, fifty-seven thousand, six hundred forty".