23778783 has 24 divisors (see below), whose sum is σ = 39381888. Its totient is φ = 13543632.

The previous prime is 23778773. The next prime is 23778787. The reversal of 23778783 is 38787732.

It is not a de Polignac number, because 23778783 - 2⁵ = 23778751 is a prime.

It is a super-2 number, since 2×23778783² = 1130861041922178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23778787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36660 + ... + 37302.

It is an arithmetic number, because the mean of its divisors is an integer number (1640912).

Almost surely, 2^23778783 is an apocalyptic number.

23778783 is a deficient number, since it is larger than the sum of its proper divisors (15603105).

23778783 is a wasteful number, since it uses less digits than its factorization.

23778783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243 (or 1240 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 23778783 is about 4876.3493517179. The cubic root of 23778783 is about 287.5609267221.

The spelling of 23778783 in words is "twenty-three million, seven hundred seventy-eight thousand, seven hundred eighty-three".