280247000 has 128 divisors (see below), whose sum is σ = 727272000. Its totient is φ = 100224000.

The previous prime is 280246961. The next prime is 280247003. The reversal of 280247000 is 742082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280247003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 802826 + ... + 803174.

Almost surely, 2^280247000 is an apocalyptic number.

280247000 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 280247000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363636000).

280247000 is an abundant number, since it is smaller than the sum of its proper divisors (447025000).

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

280247000 is a wasteful number, since it uses less digits than its factorization.

280247000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 280247000 is about 16740.5794403898. The cubic root of 280247000 is about 654.4055753516.

Adding to 280247000 its reverse (742082), we get a palindrome (280989082).

The spelling of 280247000 in words is "two hundred eighty million, two hundred forty-seven thousand".