278798871 has 16 divisors (see below), whose sum is σ = 400678880. Its totient is φ = 171417600.

The previous prime is 278798867. The next prime is 278798887. The reversal of 278798871 is 178897872.

It is not a de Polignac number, because 278798871 - 2² = 278798867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278798831) 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, 55671 + ... + 60471.

It is an arithmetic number, because the mean of its divisors is an integer number (25042430).

Almost surely, 2^278798871 is an apocalyptic number.

278798871 is a deficient number, since it is larger than the sum of its proper divisors (121880009).

278798871 is a wasteful number, since it uses less digits than its factorization.

278798871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6306.

The product of its digits is 3161088, while the sum is 57.

The square root of 278798871 is about 16697.2713639085. The cubic root of 278798871 is about 653.2764515300.

Subtracting from 278798871 its reverse (178897872), we obtain a palindrome (99900999).

The spelling of 278798871 in words is "two hundred seventy-eight million, seven hundred ninety-eight thousand, eight hundred seventy-one".