23978242 has 4 divisors (see below), whose sum is σ = 35967366. Its totient is φ = 11989120.

The previous prime is 23978239. The next prime is 23978243. The reversal of 23978242 is 24287932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19000881 + 4977361 = 4359^2 + 2231^2 .

It is not an unprimeable number, because it can be changed into a prime (23978243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5994559 + ... + 5994562.

Almost surely, 2^23978242 is an apocalyptic number.

23978242 is a deficient number, since it is larger than the sum of its proper divisors (11989124).

23978242 is a wasteful number, since it uses less digits than its factorization.

23978242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11989123.

The product of its digits is 48384, while the sum is 37.

The square root of 23978242 is about 4896.7583154573. The cubic root of 23978242 is about 288.3627197450.

The spelling of 23978242 in words is "twenty-three million, nine hundred seventy-eight thousand, two hundred forty-two".