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BaseRepresentation
bin1000100011101001110
3112020122010
41010131032
532433043
610002050
72245326
oct1043516
9466563
10280398
11181738
12116326
139a821
1474286
1558133
hex4474e

280398 has 16 divisors (see below), whose sum is σ = 594000. Its totient is φ = 87936.

The previous prime is 280373. The next prime is 280409. The reversal of 280398 is 893082.

280398 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280398.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273 + ... + 1476.

It is an arithmetic number, because the mean of its divisors is an integer number (37125).

2280398 is an apocalyptic number.

280398 is an abundant number, since it is smaller than the sum of its proper divisors (313602).

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

280398 is a wasteful number, since it uses less digits than its factorization.

280398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 280398 is about 529.5262033176. The cubic root of 280398 is about 65.4523087760.

The spelling of 280398 in words is "two hundred eighty thousand, three hundred ninety-eight".