230640440 has 32 divisors (see below), whose sum is σ = 527742000. Its totient is φ = 90691584.

The previous prime is 230640439. The next prime is 230640461. The reversal of 230640440 is 44046032.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46505 + ... + 51224.

Almost surely, 2^230640440 is an apocalyptic number.

230640440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230640440 is an abundant number, since it is smaller than the sum of its proper divisors (297101560).

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

230640440 is a wasteful number, since it uses less digits than its factorization.

230640440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97799 (or 97795 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 230640440 is about 15186.8508914785. The cubic root of 230640440 is about 613.2607257569.

Adding to 230640440 its reverse (44046032), we get a palindrome (274686472).

The spelling of 230640440 in words is "two hundred thirty million, six hundred forty thousand, four hundred forty".