23030440 has 32 divisors (see below), whose sum is σ = 52121160. Its totient is φ = 9158400.

The previous prime is 23030431. The next prime is 23030443. The reversal of 23030440 is 4403032.

It can be written as a sum of positive squares in 4 ways, for example, as 5541316 + 17489124 = 2354^2 + 4182^2 .

It is not an unprimeable number, because it can be changed into a prime (23030443) 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, 5650 + ... + 8830.

Almost surely, 2^23030440 is an apocalyptic number.

23030440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23030440 is an abundant number, since it is smaller than the sum of its proper divisors (29090720).

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

23030440 is a wasteful number, since it uses less digits than its factorization.

23030440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373 (or 3369 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 23030440 is about 4799.0040633448. The cubic root of 23030440 is about 284.5121025488.

Adding to 23030440 its reverse (4403032), we get a palindrome (27433472).

The spelling of 23030440 in words is "twenty-three million, thirty thousand, four hundred forty".