232142440 has 64 divisors (see below), whose sum is σ = 542097360. Its totient is φ = 89395200.

The previous prime is 232142413. The next prime is 232142461. The reversal of 232142440 is 44241232.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 165328164 + 66814276 = 12858^2 + 8174^2 .

It is a super-2 number, since 2×232142440² = 107780224898307200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148704 + ... + 150256.

Almost surely, 2^232142440 is an apocalyptic number.

232142440 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 232142440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271048680).

232142440 is an abundant number, since it is smaller than the sum of its proper divisors (309954920).

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

232142440 is a wasteful number, since it uses less digits than its factorization.

232142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 232142440 is about 15236.2213163238. The cubic root of 232142440 is about 614.5890925159.

Adding to 232142440 its reverse (44241232), we get a palindrome (276383672).

The spelling of 232142440 in words is "two hundred thirty-two million, one hundred forty-two thousand, four hundred forty".