280396423 has 4 divisors (see below), whose sum is σ = 281725528. Its totient is φ = 279067320.

The previous prime is 280396387. The next prime is 280396429. The reversal of 280396423 is 324693082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 280396423 - 2⁹ = 280395911 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 (280396429) 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, 664236 + ... + 664657.

It is an arithmetic number, because the mean of its divisors is an integer number (70431382).

Almost surely, 2^280396423 is an apocalyptic number.

280396423 is a deficient number, since it is larger than the sum of its proper divisors (1329105).

280396423 is a wasteful number, since it uses less digits than its factorization.

280396423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329104.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 280396423 is about 16745.0417437521. The cubic root of 280396423 is about 654.5218607125.

The spelling of 280396423 in words is "two hundred eighty million, three hundred ninety-six thousand, four hundred twenty-three".