280897200 has 240 divisors, whose sum is σ = 1033267200. Its totient is φ = 72403200.

The previous prime is 280897193. The next prime is 280897207. The reversal of 280897200 is 2798082.

It is an interprime number because it is at equal distance from previous prime (280897193) and next prime (280897207).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (280897207) 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 47 ways as a sum of consecutive naturals, for example, 334381 + ... + 335219.

It is an arithmetic number, because the mean of its divisors is an integer number (4305280).

Almost surely, 2^280897200 is an apocalyptic number.

280897200 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 280897200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (516633600).

280897200 is an abundant number, since it is smaller than the sum of its proper divisors (752370000).

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

280897200 is a wasteful number, since it uses less digits than its factorization.

280897200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 280897200 is about 16759.9880668215. The cubic root of 280897200 is about 654.9112790889.

The spelling of 280897200 in words is "two hundred eighty million, eight hundred ninety-seven thousand, two hundred".