23978142 has 12 divisors (see below), whose sum is σ = 51952680. Its totient is φ = 7992708.

The previous prime is 23978137. The next prime is 23978179. The reversal of 23978142 is 24187932.

It is a junction number, because it is equal to n+sod(n) for n = 23978097 and 23978106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 666042 + ... + 666077.

It is an arithmetic number, because the mean of its divisors is an integer number (4329390).

Almost surely, 2^23978142 is an apocalyptic number.

23978142 is an abundant number, since it is smaller than the sum of its proper divisors (27974538).

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

23978142 is a wasteful number, since it uses less digits than its factorization.

23978142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332127 (or 1332124 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 23978142 is about 4896.7481046098. The cubic root of 23978142 is about 288.3623188772.

The spelling of 23978142 in words is "twenty-three million, nine hundred seventy-eight thousand, one hundred forty-two".