23878421 has 32 divisors (see below), whose sum is σ = 31104000. Its totient is φ = 17839872.

The previous prime is 23878409. The next prime is 23878423. The reversal of 23878421 is 12487832.

It is a cyclic number.

It is not a de Polignac number, because 23878421 - 2¹⁴ = 23862037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23878423) 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 31 ways as a sum of consecutive naturals, for example, 133310 + ... + 133488.

It is an arithmetic number, because the mean of its divisors is an integer number (972000).

Almost surely, 2^23878421 is an apocalyptic number.

It is an amenable number.

23878421 is a deficient number, since it is larger than the sum of its proper divisors (7225579).

23878421 is a wasteful number, since it uses less digits than its factorization.

23878421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281.

The product of its digits is 21504, while the sum is 35.

The square root of 23878421 is about 4886.5551260576. Note that the first 3 decimals coincide. The cubic root of 23878421 is about 287.9620135406.

The spelling of 23878421 in words is "twenty-three million, eight hundred seventy-eight thousand, four hundred twenty-one".