23778567 has 6 divisors (see below), whose sum is σ = 34346832. Its totient is φ = 15852372.

The previous prime is 23778553. The next prime is 23778571. The reversal of 23778567 is 76587732.

It is not a de Polignac number, because 23778567 - 2¹⁴ = 23762183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23778577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1321023 + ... + 1321040.

It is an arithmetic number, because the mean of its divisors is an integer number (5724472).

Almost surely, 2^23778567 is an apocalyptic number.

23778567 is a deficient number, since it is larger than the sum of its proper divisors (10568265).

23778567 is a wasteful number, since it uses less digits than its factorization.

23778567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642069 (or 2642066 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 23778567 is about 4876.3272039518. The cubic root of 23778567 is about 287.5600560110.

The spelling of 23778567 in words is "twenty-three million, seven hundred seventy-eight thousand, five hundred sixty-seven".