23581978 has 8 divisors (see below), whose sum is σ = 40426272. Its totient is φ = 10106556.

The previous prime is 23581973. The next prime is 23582003. The reversal of 23581978 is 87918532.

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

It is a super-2 number, since 2×23581978² = 1112219372784968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23581973) 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, 842200 + ... + 842227.

It is an arithmetic number, because the mean of its divisors is an integer number (5053284).

Almost surely, 2^23581978 is an apocalyptic number.

23581978 is a deficient number, since it is larger than the sum of its proper divisors (16844294).

23581978 is a wasteful number, since it uses less digits than its factorization.

23581978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684436.

The product of its digits is 120960, while the sum is 43.

The square root of 23581978 is about 4856.1278813474. The cubic root of 23581978 is about 286.7653956552.

The spelling of 23581978 in words is "twenty-three million, five hundred eighty-one thousand, nine hundred seventy-eight".