280228379 has 4 divisors (see below), whose sum is σ = 280371960. Its totient is φ = 280084800.

The previous prime is 280228369. The next prime is 280228381. The reversal of 280228379 is 973822082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 973822082 = 2 ⋅486911041.

It is a cyclic number.

It is not a de Polignac number, because 280228379 - 2¹⁶ = 280162843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280228369) 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, 68822 + ... + 72779.

It is an arithmetic number, because the mean of its divisors is an integer number (70092990).

Almost surely, 2^280228379 is an apocalyptic number.

280228379 is a deficient number, since it is larger than the sum of its proper divisors (143581).

280228379 is a wasteful number, since it uses less digits than its factorization.

280228379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143580.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 280228379 is about 16740.0232676063. The cubic root of 280228379 is about 654.3910810470.

The spelling of 280228379 in words is "two hundred eighty million, two hundred twenty-eight thousand, three hundred seventy-nine".