280379 has 8 divisors (see below), whose sum is σ = 311040. Its totient is φ = 250600.

The previous prime is 280373. The next prime is 280409. The reversal of 280379 is 973082.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280379 is a prime.

It is a super-2 number, since 2×280379² = 157224767282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280373) 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, 602 + ... + 960.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2²⁸⁰³⁷⁹ is an apocalyptic number.

280379 is a deficient number, since it is larger than the sum of its proper divisors (30661).

280379 is a wasteful number, since it uses less digits than its factorization.

280379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 280379 is about 529.5082624473. The cubic root of 280379 is about 65.4508303751.

It can be divided in two parts, 2803 and 79, that added together give a palindrome (2882).

The spelling of 280379 in words is "two hundred eighty thousand, three hundred seventy-nine".