23681390 has 16 divisors (see below), whose sum is σ = 43618608. Its totient is φ = 9252096.

The previous prime is 23681389. The next prime is 23681393. The reversal of 23681390 is 9318632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23681393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27107 + ... + 27966.

It is an arithmetic number, because the mean of its divisors is an integer number (2726163).

Almost surely, 2^23681390 is an apocalyptic number.

23681390 is a deficient number, since it is larger than the sum of its proper divisors (19937218).

23681390 is a wasteful number, since it uses less digits than its factorization.

23681390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55123.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 23681390 is about 4866.3528437630. The cubic root of 23681390 is about 287.1677927147.

The spelling of 23681390 in words is "twenty-three million, six hundred eighty-one thousand, three hundred ninety".