278881323 has 16 divisors (see below), whose sum is σ = 425254656. Its totient is φ = 159251040.

The previous prime is 278881319. The next prime is 278881327. The reversal of 278881323 is 323188872.

It is an interprime number because it is at equal distance from previous prime (278881319) and next prime (278881327).

It is not a de Polignac number, because 278881323 - 2² = 278881319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (278881327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34365 + ... + 41697.

It is an arithmetic number, because the mean of its divisors is an integer number (26578416).

Almost surely, 2^278881323 is an apocalyptic number.

278881323 is a deficient number, since it is larger than the sum of its proper divisors (146373333).

278881323 is a wasteful number, since it uses less digits than its factorization.

278881323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9154.

The product of its digits is 129024, while the sum is 42.

The square root of 278881323 is about 16699.7402075601. The cubic root of 278881323 is about 653.3408451922.

The spelling of 278881323 in words is "two hundred seventy-eight million, eight hundred eighty-one thousand, three hundred twenty-three".