280955 has 8 divisors (see below), whose sum is σ = 341712. Its totient is φ = 221728.

The previous prime is 280949. The next prime is 280957. The reversal of 280955 is 559082.

280955 = T₁₈₆ + T₁₈₇ + ... + T₂₀₀.

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 280955 - 2⁴ = 280939 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280955.

It is not an unprimeable number, because it can be changed into a prime (280957) 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, 77 + ... + 753.

It is an arithmetic number, because the mean of its divisors is an integer number (42714).

2²⁸⁰⁹⁵⁵ is an apocalyptic number.

280955 is a deficient number, since it is larger than the sum of its proper divisors (60757).

280955 is an equidigital number, since it uses as much as digits as its factorization.

280955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 280955 is about 530.0518842529. The cubic root of 280955 is about 65.4956196204.

The spelling of 280955 in words is "two hundred eighty thousand, nine hundred fifty-five".