23163940 has 12 divisors (see below), whose sum is σ = 48644316. Its totient is φ = 9265568.

The previous prime is 23163923. The next prime is 23163947. The reversal of 23163940 is 4936132.

It can be written as a sum of positive squares in 2 ways, for example, as 4032064 + 19131876 = 2008^2 + 4374^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23163899 and 23163908.

It is not an unprimeable number, because it can be changed into a prime (23163947) 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, 579079 + ... + 579118.

It is an arithmetic number, because the mean of its divisors is an integer number (4053693).

Almost surely, 2^23163940 is an apocalyptic number.

23163940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23163940 is an abundant number, since it is smaller than the sum of its proper divisors (25480376).

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

23163940 is a wasteful number, since it uses less digits than its factorization.

23163940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158206 (or 1158204 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 23163940 is about 4812.8931008282. The cubic root of 23163940 is about 285.0607852290.

The spelling of 23163940 in words is "twenty-three million, one hundred sixty-three thousand, nine hundred forty".