23881940 has 24 divisors (see below), whose sum is σ = 53102952. Its totient is φ = 8990720.

The previous prime is 23881939. The next prime is 23881973. The reversal of 23881940 is 4918832.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13410244 + 10471696 = 3662^2 + 3236^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23881940.

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, 34781 + ... + 35460.

It is an arithmetic number, because the mean of its divisors is an integer number (2212623).

Almost surely, 2^23881940 is an apocalyptic number.

23881940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23881940 is an abundant number, since it is smaller than the sum of its proper divisors (29221012).

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

23881940 is a wasteful number, since it uses less digits than its factorization.

23881940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70267 (or 70265 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 23881940 is about 4886.9151824029. The cubic root of 23881940 is about 287.9761586488.

The spelling of 23881940 in words is "twenty-three million, eight hundred eighty-one thousand, nine hundred forty".