23780736 has 128 divisors (see below), whose sum is σ = 80294400. Its totient is φ = 6787584.

The previous prime is 23780707. The next prime is 23780767. The reversal of 23780736 is 63708732.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 23780736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23701 + ... + 24683.

It is an arithmetic number, because the mean of its divisors is an integer number (627300).

Almost surely, 2^23780736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23780736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40147200).

23780736 is an abundant number, since it is smaller than the sum of its proper divisors (56513664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23780736 is an equidigital number, since it uses as much as digits as its factorization.

23780736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 23780736 is about 4876.5495998708. The cubic root of 23780736 is about 287.5687991619.

The spelling of 23780736 in words is "twenty-three million, seven hundred eighty thousand, seven hundred thirty-six".