280225000 has 96 divisors (see below), whose sum is σ = 717141600. Its totient is φ = 101800000.

The previous prime is 280224979. The next prime is 280225003. The reversal of 280225000 is 522082.

It is not an unprimeable number, because it can be changed into a prime (280225003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274491 + ... + 275509.

It is an arithmetic number, because the mean of its divisors is an integer number (7470225).

Almost surely, 2^280225000 is an apocalyptic number.

280225000 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 280225000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358570800).

280225000 is an abundant number, since it is smaller than the sum of its proper divisors (436916600).

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

280225000 is a wasteful number, since it uses less digits than its factorization.

280225000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061 (or 1037 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 280225000 is about 16739.9223415164. The cubic root of 280225000 is about 654.3884508157.

Adding to 280225000 its reverse (522082), we get a palindrome (280747082).

The spelling of 280225000 in words is "two hundred eighty million, two hundred twenty-five thousand".