230403143440 has 40 divisors (see below), whose sum is σ = 535971242520. Its totient is φ = 92112408576.

The previous prime is 230403143431. The next prime is 230403143447. The reversal of 230403143440 is 44341304032.

It can be written as a sum of positive squares in 4 ways, for example, as 13504299264 + 216898844176 = 116208^2 + 465724^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 230403143399 and 230403143408.

It is not an unprimeable number, because it can be changed into a prime (230403143447) 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, 611199 + ... + 913438.

It is an arithmetic number, because the mean of its divisors is an integer number (13399281063).

Almost surely, 2^230403143440 is an apocalyptic number.

230403143440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230403143440 is an abundant number, since it is smaller than the sum of its proper divisors (305568099080).

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

230403143440 is a wasteful number, since it uses less digits than its factorization.

230403143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526539 (or 1526533 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 230403143440 its reverse (44341304032), we get a palindrome (274744447472).

The spelling of 230403143440 in words is "two hundred thirty billion, four hundred three million, one hundred forty-three thousand, four hundred forty".