23291140 has 12 divisors (see below), whose sum is σ = 48911436. Its totient is φ = 9316448.

The previous prime is 23291129. The next prime is 23291141. The reversal of 23291140 is 4119232.

It can be written as a sum of positive squares in 2 ways, for example, as 9048064 + 14243076 = 3008^2 + 3774^2 .

It is not an unprimeable number, because it can be changed into a prime (23291141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582259 + ... + 582298.

It is an arithmetic number, because the mean of its divisors is an integer number (4075953).

Almost surely, 2^23291140 is an apocalyptic number.

23291140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23291140 is an abundant number, since it is smaller than the sum of its proper divisors (25620296).

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

23291140 is a wasteful number, since it uses less digits than its factorization.

23291140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164566 (or 1164564 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 23291140 is about 4826.0895142962. The cubic root of 23291140 is about 285.5816172158.

The spelling of 23291140 in words is "twenty-three million, two hundred ninety-one thousand, one hundred forty".