280064479 has 4 divisors (see below), whose sum is σ = 280136376. Its totient is φ = 279992584.

The previous prime is 280064453. The next prime is 280064501. The reversal of 280064479 is 974460082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974460082 = 2 ⋅487230041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280064479 is a prime.

It is a super-2 number, since 2×280064479² = 156872224795082882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280064419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29749 + ... + 38014.

It is an arithmetic number, because the mean of its divisors is an integer number (70034094).

Almost surely, 2^280064479 is an apocalyptic number.

280064479 is a deficient number, since it is larger than the sum of its proper divisors (71897).

280064479 is an equidigital number, since it uses as much as digits as its factorization.

280064479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71896.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 280064479 is about 16735.1270984119. The cubic root of 280064479 is about 654.2634760607.

The spelling of 280064479 in words is "two hundred eighty million, sixty-four thousand, four hundred seventy-nine".