280813355 has 8 divisors (see below), whose sum is σ = 338838864. Its totient is φ = 223408800.

The previous prime is 280813343. The next prime is 280813399. The reversal of 280813355 is 553318082.

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

It is not a de Polignac number, because 280813355 - 2¹⁰ = 280812331 is a prime.

It is a super-2 number, since 2×280813355² = 157712280692712050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154241 + ... + 156050.

It is an arithmetic number, because the mean of its divisors is an integer number (42354858).

Almost surely, 2^280813355 is an apocalyptic number.

280813355 is a deficient number, since it is larger than the sum of its proper divisors (58025509).

280813355 is a wasteful number, since it uses less digits than its factorization.

280813355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310477.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 280813355 is about 16757.4865358740. The cubic root of 280813355 is about 654.8461111193.

The spelling of 280813355 in words is "two hundred eighty million, eight hundred thirteen thousand, three hundred fifty-five".