278920283 has 6 divisors (see below), whose sum is σ = 280382316. Its totient is φ = 277465832.

The previous prime is 278920277. The next prime is 278920297. The reversal of 278920283 is 382029872.

It is not a de Polignac number, because 278920283 - 2⁶ = 278920219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 278920283.

It is not an unprimeable number, because it can be changed into a prime (278920183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35216 + ... + 42402.

It is an arithmetic number, because the mean of its divisors is an integer number (46730386).

Almost surely, 2^278920283 is an apocalyptic number.

278920283 is a deficient number, since it is larger than the sum of its proper divisors (1462033).

278920283 is an frugal number, since it uses more digits than its factorization.

278920283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7581 (or 7384 counting only the distinct ones).

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

The square root of 278920283 is about 16700.9066520354. The cubic root of 278920283 is about 653.3712678989.

The spelling of 278920283 in words is "two hundred seventy-eight million, nine hundred twenty thousand, two hundred eighty-three".