23031340 has 24 divisors (see below), whose sum is σ = 49547232. Its totient is φ = 8987520.

The previous prime is 23031329. The next prime is 23031367. The reversal of 23031340 is 4313032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13224 + ... + 14863.

It is an arithmetic number, because the mean of its divisors is an integer number (2064468).

Almost surely, 2^23031340 is an apocalyptic number.

23031340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23031340 is an abundant number, since it is smaller than the sum of its proper divisors (26515892).

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

23031340 is a wasteful number, since it uses less digits than its factorization.

23031340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28137 (or 28135 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 23031340 is about 4799.0978318847. The cubic root of 23031340 is about 284.5158086230.

Adding to 23031340 its reverse (4313032), we get a palindrome (27344372).

The spelling of 23031340 in words is "twenty-three million, thirty-one thousand, three hundred forty".