230785640 has 32 divisors (see below), whose sum is σ = 520135560. Its totient is φ = 92160000.

The previous prime is 230785637. The next prime is 230785661. The reversal of 230785640 is 46587032.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 195049156 + 35736484 = 13966^2 + 5978^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 230785640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21140 + ... + 30140.

Almost surely, 2^230785640 is an apocalyptic number.

230785640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230785640 is an abundant number, since it is smaller than the sum of its proper divisors (289349920).

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

230785640 is a wasteful number, since it uses less digits than its factorization.

230785640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9653 (or 9649 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 230785640 is about 15191.6305905587. The cubic root of 230785640 is about 613.3893917990.

The spelling of 230785640 in words is "two hundred thirty million, seven hundred eighty-five thousand, six hundred forty".