23530840 has 32 divisors (see below), whose sum is σ = 55248480. Its totient is φ = 9002752.

The previous prime is 23530813. The next prime is 23530849. The reversal of 23530840 is 4803532.

It is a super-2 number, since 2×23530840² = 1107400862211200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23530849) 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, 11869 + ... + 13708.

It is an arithmetic number, because the mean of its divisors is an integer number (1726515).

Almost surely, 2^23530840 is an apocalyptic number.

23530840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23530840 is an abundant number, since it is smaller than the sum of its proper divisors (31717640).

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

23530840 is a wasteful number, since it uses less digits than its factorization.

23530840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25611 (or 25607 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 23530840 is about 4850.8597176171. The cubic root of 23530840 is about 286.5579601047.

The spelling of 23530840 in words is "twenty-three million, five hundred thirty thousand, eight hundred forty".