23978356 has 6 divisors (see below), whose sum is σ = 41962130. Its totient is φ = 11989176.

The previous prime is 23978329. The next prime is 23978377. The reversal of 23978356 is 65387932.

It can be written as a sum of positive squares in only one way, i.e., 17926756 + 6051600 = 4234^2 + 2460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2997291 + ... + 2997298.

Almost surely, 2^23978356 is an apocalyptic number.

It is an amenable number.

23978356 is a deficient number, since it is larger than the sum of its proper divisors (17983774).

23978356 is a wasteful number, since it uses less digits than its factorization.

23978356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994593 (or 5994591 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 23978356 is about 4896.7699557974. The cubic root of 23978356 is about 288.3631767329.

The spelling of 23978356 in words is "twenty-three million, nine hundred seventy-eight thousand, three hundred fifty-six".