23738781 has 16 divisors (see below), whose sum is σ = 34610688. Its totient is φ = 14353200.

The previous prime is 23738773. The next prime is 23738843. The reversal of 23738781 is 18783732.

It is not a de Polignac number, because 23738781 - 2³ = 23738773 is a prime.

It is a super-2 number, since 2×23738781² = 1127059446731922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23738711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26320 + ... + 27206.

It is an arithmetic number, because the mean of its divisors is an integer number (2163168).

Almost surely, 2^23738781 is an apocalyptic number.

It is an amenable number.

23738781 is a deficient number, since it is larger than the sum of its proper divisors (10871907).

23738781 is a wasteful number, since it uses less digits than its factorization.

23738781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712.

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

The square root of 23738781 is about 4872.2459913268. The cubic root of 23738781 is about 287.3995858528.

The spelling of 23738781 in words is "twenty-three million, seven hundred thirty-eight thousand, seven hundred eighty-one".