280830105 has 16 divisors (see below), whose sum is σ = 499253760. Its totient is φ = 149775984.

The previous prime is 280830103. The next prime is 280830131. The reversal of 280830105 is 501038082.

It is a happy number.

It is not a de Polignac number, because 280830105 - 2¹ = 280830103 is a prime.

It is a super-2 number, since 2×280830105² = 157731095748622050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (280830103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1039977 + ... + 1040246.

It is an arithmetic number, because the mean of its divisors is an integer number (31203360).

Almost surely, 2^280830105 is an apocalyptic number.

It is an amenable number.

280830105 is a deficient number, since it is larger than the sum of its proper divisors (218423655).

280830105 is a wasteful number, since it uses less digits than its factorization.

280830105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080237 (or 2080231 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 280830105 is about 16757.9863050427. The cubic root of 280830105 is about 654.8591309824.

Adding to 280830105 its reverse (501038082), we get a palindrome (781868187).

The spelling of 280830105 in words is "two hundred eighty million, eight hundred thirty thousand, one hundred five".