23878840 has 32 divisors (see below), whose sum is σ = 53988480. Its totient is φ = 9505152.

The previous prime is 23878837. The next prime is 23878843. The reversal of 23878840 is 4887832.

It is an interprime number because it is at equal distance from previous prime (23878837) and next prime (23878843).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 23878793 and 23878802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23878843) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7582 + ... + 10258.

It is an arithmetic number, because the mean of its divisors is an integer number (1687140).

Almost surely, 2^23878840 is an apocalyptic number.

23878840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23878840 is an abundant number, since it is smaller than the sum of its proper divisors (30109640).

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

23878840 is a wasteful number, since it uses less digits than its factorization.

23878840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911 (or 2907 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 23878840 is about 4886.5979986080. The cubic root of 23878840 is about 287.9636978420.

The spelling of 23878840 in words is "twenty-three million, eight hundred seventy-eight thousand, eight hundred forty".