280423009 has 8 divisors (see below), whose sum is σ = 287756928. Its totient is φ = 273146160.

The previous prime is 280422997. The next prime is 280423027. The reversal of 280423009 is 900324082.

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

It is a cyclic number.

It is not a de Polignac number, because 280423009 - 2⁵ = 280422977 is a prime.

It is a super-2 number, since 2×280423009² = 157274127953228162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280423049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4222 + ... + 24055.

It is an arithmetic number, because the mean of its divisors is an integer number (35969616).

Almost surely, 2^280423009 is an apocalyptic number.

It is an amenable number.

280423009 is a deficient number, since it is larger than the sum of its proper divisors (7333919).

280423009 is a wasteful number, since it uses less digits than its factorization.

280423009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28535.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 280423009 is about 16745.8355718668. The cubic root of 280423009 is about 654.5425463880.

The spelling of 280423009 in words is "two hundred eighty million, four hundred twenty-three thousand, nine".