280331323000 has 128 divisors (see below), whose sum is σ = 663478358400. Its totient is φ = 110854656000.

The previous prime is 280331322979. The next prime is 280331323001. The reversal of 280331323000 is 323133082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280331323001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53080360 + ... + 53085640.

It is an arithmetic number, because the mean of its divisors is an integer number (5183424675).

Almost surely, 2^280331323000 is an apocalyptic number.

280331323000 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 280331323000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331739179200).

280331323000 is an abundant number, since it is smaller than the sum of its proper divisors (383147035400).

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

280331323000 is a wasteful number, since it uses less digits than its factorization.

280331323000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5898 (or 5884 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 280331323000 its reverse (323133082), we get a palindrome (280654456082).

The spelling of 280331323000 in words is "two hundred eighty billion, three hundred thirty-one million, three hundred twenty-three thousand".