23803640 has 64 divisors (see below), whose sum is σ = 61724160. Its totient is φ = 8092800.

The previous prime is 23803631. The next prime is 23803649. The reversal of 23803640 is 4630832.

It is an interprime number because it is at equal distance from previous prime (23803631) and next prime (23803649).

It is a super-2 number, since 2×23803640² = 1133226554499200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23803649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41999 + ... + 42561.

It is an arithmetic number, because the mean of its divisors is an integer number (964440).

Almost surely, 2^23803640 is an apocalyptic number.

23803640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23803640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30862080).

23803640 is an abundant number, since it is smaller than the sum of its proper divisors (37920520).

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

23803640 is a wasteful number, since it uses less digits than its factorization.

23803640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 23803640 is about 4878.8974164251. The cubic root of 23803640 is about 287.6610918249.

The spelling of 23803640 in words is "twenty-three million, eight hundred three thousand, six hundred forty".