23255840 has 24 divisors (see below), whose sum is σ = 54942300. Its totient is φ = 9302272.

The previous prime is 23255839. The next prime is 23255849. The reversal of 23255840 is 4855232.

It can be written as a sum of positive squares in 2 ways, for example, as 22543504 + 712336 = 4748^2 + 844^2 .

It is not an unprimeable number, because it can be changed into a prime (23255849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72515 + ... + 72834.

Almost surely, 2^23255840 is an apocalyptic number.

23255840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23255840 is an abundant number, since it is smaller than the sum of its proper divisors (31686460).

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

23255840 is a wasteful number, since it uses less digits than its factorization.

23255840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145364 (or 145356 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 23255840 is about 4822.4309222632. The cubic root of 23255840 is about 285.4372686451.

The spelling of 23255840 in words is "twenty-three million, two hundred fifty-five thousand, eight hundred forty".