280305226 has 8 divisors (see below), whose sum is σ = 423242784. Its totient is φ = 139224300.

The previous prime is 280305203. The next prime is 280305241. The reversal of 280305226 is 622503082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×280305226² = 157142039445822152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 280305194 and 280305203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463780 + ... + 464383.

It is an arithmetic number, because the mean of its divisors is an integer number (52905348).

Almost surely, 2^280305226 is an apocalyptic number.

280305226 is a deficient number, since it is larger than the sum of its proper divisors (142937558).

280305226 is a wasteful number, since it uses less digits than its factorization.

280305226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928316.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 280305226 is about 16742.3184177103. The cubic root of 280305226 is about 654.4508934465.

The spelling of 280305226 in words is "two hundred eighty million, three hundred five thousand, two hundred twenty-six".