23147978 has 8 divisors (see below), whose sum is σ = 39682272. Its totient is φ = 9920556.

The previous prime is 23147963. The next prime is 23147987. The reversal of 23147978 is 87974132.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826700 + ... + 826727.

It is an arithmetic number, because the mean of its divisors is an integer number (4960284).

Almost surely, 2^23147978 is an apocalyptic number.

23147978 is a deficient number, since it is larger than the sum of its proper divisors (16534294).

23147978 is a wasteful number, since it uses less digits than its factorization.

23147978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653436.

The product of its digits is 84672, while the sum is 41.

The square root of 23147978 is about 4811.2345609001. The cubic root of 23147978 is about 284.9952928329.

The spelling of 23147978 in words is "twenty-three million, one hundred forty-seven thousand, nine hundred seventy-eight".