280427813 has 8 divisors (see below), whose sum is σ = 284234016. Its totient is φ = 276642000.

The previous prime is 280427779. The next prime is 280427857. The reversal of 280427813 is 318724082.

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 280427813 - 2¹⁴ = 280411429 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 (280427513) 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, 23678 + ... + 33488.

It is an arithmetic number, because the mean of its divisors is an integer number (35529252).

Almost surely, 2^280427813 is an apocalyptic number.

It is an amenable number.

280427813 is a deficient number, since it is larger than the sum of its proper divisors (3806203).

280427813 is a wasteful number, since it uses less digits than its factorization.

280427813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10195.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 280427813 is about 16745.9790098997. The cubic root of 280427813 is about 654.5462840799.

The spelling of 280427813 in words is "two hundred eighty million, four hundred twenty-seven thousand, eight hundred thirteen".