280998140 has 12 divisors (see below), whose sum is σ = 590096136. Its totient is φ = 112399248.

The previous prime is 280998127. The next prime is 280998143. The reversal of 280998140 is 41899082.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280998143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7024934 + ... + 7024973.

It is an arithmetic number, because the mean of its divisors is an integer number (49174678).

Almost surely, 2^280998140 is an apocalyptic number.

280998140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280998140 is an abundant number, since it is smaller than the sum of its proper divisors (309097996).

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

280998140 is a wasteful number, since it uses less digits than its factorization.

280998140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14049916 (or 14049914 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 280998140 is about 16762.9991349997. Note that the first 3 decimals coincide. The cubic root of 280998140 is about 654.9897168325.

The spelling of 280998140 in words is "two hundred eighty million, nine hundred ninety-eight thousand, one hundred forty".