23781616 has 20 divisors (see below), whose sum is σ = 48502600. Its totient is φ = 11264832.

The previous prime is 23781613. The next prime is 23781617. The reversal of 23781616 is 61618732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23781613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38811 + ... + 39418.

It is an arithmetic number, because the mean of its divisors is an integer number (2425130).

Almost surely, 2^23781616 is an apocalyptic number.

It is an amenable number.

23781616 is an abundant number, since it is smaller than the sum of its proper divisors (24720984).

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

23781616 is a wasteful number, since it uses less digits than its factorization.

23781616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78256 (or 78250 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 23781616 is about 4876.6398267660. The cubic root of 23781616 is about 287.5723462546.

The spelling of 23781616 in words is "twenty-three million, seven hundred eighty-one thousand, six hundred sixteen".