23032840 has 16 divisors (see below), whose sum is σ = 51823980. Its totient is φ = 9213120.

The previous prime is 23032837. The next prime is 23032843. The reversal of 23032840 is 4823032.

It is an interprime number because it is at equal distance from previous prime (23032837) and next prime (23032843).

It can be written as a sum of positive squares in 2 ways, for example, as 20848356 + 2184484 = 4566^2 + 1478^2 .

It is not an unprimeable number, because it can be changed into a prime (23032843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287871 + ... + 287950.

Almost surely, 2^23032840 is an apocalyptic number.

23032840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23032840 is an abundant number, since it is smaller than the sum of its proper divisors (28791140).

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

23032840 is a wasteful number, since it uses less digits than its factorization.

23032840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575832 (or 575828 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 23032840 is about 4799.2541087131. The cubic root of 23032840 is about 284.5219851988.

Adding to 23032840 its reverse (4823032), we get a palindrome (27855872).

The spelling of 23032840 in words is "twenty-three million, thirty-two thousand, eight hundred forty".