280343401 has 16 divisors (see below), whose sum is σ = 306230400. Its totient is φ = 255103488.

The previous prime is 280343387. The next prime is 280343407. The reversal of 280343401 is 104343082.

It is a cyclic number.

It is not a de Polignac number, because 280343401 - 2¹⁷ = 280212329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280343407) 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, 301305 + ... + 302233.

It is an arithmetic number, because the mean of its divisors is an integer number (19139400).

Almost surely, 2^280343401 is an apocalyptic number.

It is an amenable number.

280343401 is a deficient number, since it is larger than the sum of its proper divisors (25886999).

280343401 is a wasteful number, since it uses less digits than its factorization.

280343401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 280343401 is about 16743.4584539754. The cubic root of 280343401 is about 654.4806021669.

Adding to 280343401 its reverse (104343082), we get a palindrome (384686483).

The spelling of 280343401 in words is "two hundred eighty million, three hundred forty-three thousand, four hundred one".