233231440 has 40 divisors (see below), whose sum is σ = 583978248. Its totient is φ = 86115840.

The previous prime is 233231413. The next prime is 233231443. The reversal of 233231440 is 44132332.

It is a happy number.

233231440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11102224 + 222129216 = 3332^2 + 14904^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233231443) 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, 111091 + ... + 113170.

Almost surely, 2^233231440 is an apocalyptic number.

233231440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233231440 is an abundant number, since it is smaller than the sum of its proper divisors (350746808).

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

233231440 is a wasteful number, since it uses less digits than its factorization.

233231440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224287 (or 224281 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 233231440 is about 15271.9167100924. The cubic root of 233231440 is about 615.5486236255.

Adding to 233231440 its reverse (44132332), we get a palindrome (277363772).

The spelling of 233231440 in words is "two hundred thirty-three million, two hundred thirty-one thousand, four hundred forty".