23694640 has 20 divisors (see below), whose sum is σ = 55090224. Its totient is φ = 9477824.

The previous prime is 23694637. The next prime is 23694641. The reversal of 23694640 is 4649632.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×23694640² = 1122871929459200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23694596 and 23694605.

It is not an unprimeable number, because it can be changed into a prime (23694641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148012 + ... + 148171.

Almost surely, 2^23694640 is an apocalyptic number.

23694640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23694640 is an abundant number, since it is smaller than the sum of its proper divisors (31395584).

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

23694640 is a wasteful number, since it uses less digits than its factorization.

23694640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296196 (or 296190 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 23694640 is about 4867.7140425460. The cubic root of 23694640 is about 287.2213405826.

The spelling of 23694640 in words is "twenty-three million, six hundred ninety-four thousand, six hundred forty".