23381778 has 16 divisors (see below), whose sum is σ = 53444160. Its totient is φ = 6680496.

The previous prime is 23381741. The next prime is 23381779. The reversal of 23381778 is 87718332.

It is not an unprimeable number, because it can be changed into a prime (23381779) 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 in 7 ways as a sum of consecutive naturals, for example, 278313 + ... + 278396.

It is an arithmetic number, because the mean of its divisors is an integer number (3340260).

Almost surely, 2^23381778 is an apocalyptic number.

23381778 is an abundant number, since it is smaller than the sum of its proper divisors (30062382).

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

23381778 is a wasteful number, since it uses less digits than its factorization.

23381778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556721.

The product of its digits is 56448, while the sum is 39.

The square root of 23381778 is about 4835.4708147191. The cubic root of 23381778 is about 285.9515868303.

The spelling of 23381778 in words is "twenty-three million, three hundred eighty-one thousand, seven hundred seventy-eight".