23783855 has 4 divisors (see below), whose sum is σ = 28540632. Its totient is φ = 19027080.

The previous prime is 23783777. The next prime is 23783869. The reversal of 23783855 is 55838732.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23783855 - 2¹⁸ = 23521711 is a prime.

It is a super-2 number, since 2×23783855² = 1131343517322050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 2378381 + ... + 2378390.

It is an arithmetic number, because the mean of its divisors is an integer number (7135158).

Almost surely, 2^23783855 is an apocalyptic number.

23783855 is a deficient number, since it is larger than the sum of its proper divisors (4756777).

23783855 is an equidigital number, since it uses as much as digits as its factorization.

23783855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756776.

The product of its digits is 201600, while the sum is 41.

The square root of 23783855 is about 4876.8693851691. The cubic root of 23783855 is about 287.5813707924.

The spelling of 23783855 in words is "twenty-three million, seven hundred eighty-three thousand, eight hundred fifty-five".