23683440 has 80 divisors (see below), whose sum is σ = 80102016. Its totient is φ = 5740800.

The previous prime is 23683417. The next prime is 23683447. The reversal of 23683440 is 4438632.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23683398 and 23683407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23683447) 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 15 ways as a sum of consecutive naturals, for example, 1846 + ... + 7125.

Almost surely, 2^23683440 is an apocalyptic number.

23683440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23683440 is an abundant number, since it is smaller than the sum of its proper divisors (56418576).

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

23683440 is a wasteful number, since it uses less digits than its factorization.

23683440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8998 (or 8992 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 23683440 is about 4866.5634692255. The cubic root of 23683440 is about 287.1760787850.

The spelling of 23683440 in words is "twenty-three million, six hundred eighty-three thousand, four hundred forty".