867988278 has 32 divisors (see below), whose sum is σ = 2042327520. Its totient is φ = 272309760.

The previous prime is 867988223. The next prime is 867988279. The reversal of 867988278 is 872889768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867988279) 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, 471843 + ... + 473678.

It is an arithmetic number, because the mean of its divisors is an integer number (63822735).

Almost surely, 2^867988278 is an apocalyptic number.

867988278 is an abundant number, since it is smaller than the sum of its proper divisors (1174339242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

867988278 is a wasteful number, since it uses less digits than its factorization.

867988278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945549 (or 945543 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 63.

The square root of 867988278 is about 29461.6407893383. The cubic root of 867988278 is about 953.9038904801.

The spelling of 867988278 in words is "eight hundred sixty-seven million, nine hundred eighty-eight thousand, two hundred seventy-eight".