23140038 has 16 divisors (see below), whose sum is σ = 46332720. Its totient is φ = 7704576.

The previous prime is 23140037. The next prime is 23140067. The reversal of 23140038 is 83004132.

It is a happy number.

It is a super-2 number, since 2×23140038² = 1070922717282888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23139996 and 23140023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23140037) by changing a digit.

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, 5718 + ... + 8886.

It is an arithmetic number, because the mean of its divisors is an integer number (2895795).

Almost surely, 2^23140038 is an apocalyptic number.

23140038 is an abundant number, since it is smaller than the sum of its proper divisors (23192682).

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

23140038 is a wasteful number, since it uses less digits than its factorization.

23140038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 23140038 is about 4810.4093380917. The cubic root of 23140038 is about 284.9627036451.

The spelling of 23140038 in words is "twenty-three million, one hundred forty thousand, thirty-eight".