23193978 has 8 divisors (see below), whose sum is σ = 46387968. Its totient is φ = 7731324.

The previous prime is 23193977. The next prime is 23193979. The reversal of 23193978 is 87939132.

It is an interprime number because it is at equal distance from previous prime (23193977) and next prime (23193979).

It is a sphenic number, since it is the product of 3 distinct primes.

23193978 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (23193971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1932826 + ... + 1932837.

It is an arithmetic number, because the mean of its divisors is an integer number (5798496).

Almost surely, 2^23193978 is an apocalyptic number.

23193978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

23193978 is a wasteful number, since it uses less digits than its factorization.

23193978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3865668.

The product of its digits is 81648, while the sum is 42.

The square root of 23193978 is about 4816.0126660963. The cubic root of 23193978 is about 285.1839501901.

The spelling of 23193978 in words is "twenty-three million, one hundred ninety-three thousand, nine hundred seventy-eight".