280423317 has 8 divisors (see below), whose sum is σ = 375116896. Its totient is φ = 186339312.

The previous prime is 280423309. The next prime is 280423331. The reversal of 280423317 is 713324082.

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

It is not a de Polignac number, because 280423317 - 2³ = 280423309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280423397) 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, 151318 + ... + 153159.

It is an arithmetic number, because the mean of its divisors is an integer number (46889612).

Almost surely, 2^280423317 is an apocalyptic number.

It is an amenable number.

280423317 is a deficient number, since it is larger than the sum of its proper divisors (94693579).

280423317 is a wasteful number, since it uses less digits than its factorization.

280423317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304787.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 280423317 is about 16745.8447681806. The cubic root of 280423317 is about 654.5427860248.

Adding to 280423317 its reverse (713324082), we get a palindrome (993747399).

The spelling of 280423317 in words is "two hundred eighty million, four hundred twenty-three thousand, three hundred seventeen".