23778861 has 8 divisors (see below), whose sum is σ = 33373920. Its totient is φ = 15018192.

The previous prime is 23778857. The next prime is 23778863. The reversal of 23778861 is 16887732.

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

It is not a de Polignac number, because 23778861 - 2² = 23778857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23778863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208530 + ... + 208643.

It is an arithmetic number, because the mean of its divisors is an integer number (4171740).

Almost surely, 2^23778861 is an apocalyptic number.

It is an amenable number.

23778861 is a deficient number, since it is larger than the sum of its proper divisors (9595059).

23778861 is a wasteful number, since it uses less digits than its factorization.

23778861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417195.

The product of its digits is 112896, while the sum is 42.

The square root of 23778861 is about 4876.3573494977. The cubic root of 23778861 is about 287.5612411442.

The spelling of 23778861 in words is "twenty-three million, seven hundred seventy-eight thousand, eight hundred sixty-one".