23140340 has 12 divisors (see below), whose sum is σ = 48594756. Its totient is φ = 9256128.

The previous prime is 23140319. The next prime is 23140357. The reversal of 23140340 is 4304132.

It can be written as a sum of positive squares in 2 ways, for example, as 13380964 + 9759376 = 3658^2 + 3124^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578489 + ... + 578528.

It is an arithmetic number, because the mean of its divisors is an integer number (4049563).

Almost surely, 2^23140340 is an apocalyptic number.

23140340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23140340 is an abundant number, since it is smaller than the sum of its proper divisors (25454416).

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

23140340 is a wasteful number, since it uses less digits than its factorization.

23140340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157026 (or 1157024 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 23140340 is about 4810.4407282493. The cubic root of 23140340 is about 284.9639433199.

Adding to 23140340 its reverse (4304132), we get a palindrome (27444472).

The spelling of 23140340 in words is "twenty-three million, one hundred forty thousand, three hundred forty".