23439140 has 12 divisors (see below), whose sum is σ = 49222236. Its totient is φ = 9375648.

The previous prime is 23439109. The next prime is 23439149. The reversal of 23439140 is 4193432.

It can be written as a sum of positive squares in 2 ways, for example, as 13147876 + 10291264 = 3626^2 + 3208^2 .

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (23439149) 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, 585959 + ... + 585998.

It is an arithmetic number, because the mean of its divisors is an integer number (4101853).

Almost surely, 2^23439140 is an apocalyptic number.

23439140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23439140 is an abundant number, since it is smaller than the sum of its proper divisors (25783096).

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

23439140 is a wasteful number, since it uses less digits than its factorization.

23439140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171966 (or 1171964 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 23439140 is about 4841.3985582681. The cubic root of 23439140 is about 286.1852354386.

The spelling of 23439140 in words is "twenty-three million, four hundred thirty-nine thousand, one hundred forty".