23057220 has 24 divisors (see below), whose sum is σ = 64560384. Its totient is φ = 6148576.

The previous prime is 23057183. The next prime is 23057227. The reversal of 23057220 is 2275032.

It is not an unprimeable number, because it can be changed into a prime (23057227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192084 + ... + 192203.

It is an arithmetic number, because the mean of its divisors is an integer number (2690016).

Almost surely, 2^23057220 is an apocalyptic number.

23057220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23057220 is an abundant number, since it is smaller than the sum of its proper divisors (41503164).

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

23057220 is a wasteful number, since it uses less digits than its factorization.

23057220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384299 (or 384297 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 23057220 is about 4801.7934149649. The cubic root of 23057220 is about 284.6223375650.

The spelling of 23057220 in words is "twenty-three million, fifty-seven thousand, two hundred twenty".