23243978 has 4 divisors (see below), whose sum is σ = 34865970. Its totient is φ = 11621988.

The previous prime is 23243977. The next prime is 23243999. The reversal of 23243978 is 87934232.

It is a happy number.

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., 16024009 + 7219969 = 4003^2 + 2687^2 .

It is not an unprimeable number, because it can be changed into a prime (23243977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5810993 + ... + 5810996.

Almost surely, 2^23243978 is an apocalyptic number.

23243978 is a deficient number, since it is larger than the sum of its proper divisors (11621992).

23243978 is a wasteful number, since it uses less digits than its factorization.

23243978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11621991.

The product of its digits is 72576, while the sum is 38.

The square root of 23243978 is about 4821.2008877457. The cubic root of 23243978 is about 285.3887298305.

The spelling of 23243978 in words is "twenty-three million, two hundred forty-three thousand, nine hundred seventy-eight".