23423140 has 24 divisors (see below), whose sum is σ = 52972920. Its totient is φ = 8648448.

The previous prime is 23423137. The next prime is 23423159. The reversal of 23423140 is 4132432.

It can be written as a sum of positive squares in 4 ways, for example, as 746496 + 22676644 = 864^2 + 4762^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 44785 + ... + 45304.

It is an arithmetic number, because the mean of its divisors is an integer number (2207205).

Almost surely, 2^23423140 is an apocalyptic number.

23423140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23423140 is an abundant number, since it is smaller than the sum of its proper divisors (29549780).

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

23423140 is a wasteful number, since it uses less digits than its factorization.

23423140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90111 (or 90109 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 23423140 is about 4839.7458610964. The cubic root of 23423140 is about 286.1201021322.

Adding to 23423140 its reverse (4132432), we get a palindrome (27555572).

The spelling of 23423140 in words is "twenty-three million, four hundred twenty-three thousand, one hundred forty".