278342668 has 24 divisors (see below), whose sum is σ = 496772640. Its totient is φ = 136435200.

The previous prime is 278342663. The next prime is 278342677. The reversal of 278342668 is 866243872.

It is not an unprimeable number, because it can be changed into a prime (278342663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38268 + ... + 44956.

It is an arithmetic number, because the mean of its divisors is an integer number (20698860).

Almost surely, 2^278342668 is an apocalyptic number.

It is an amenable number.

278342668 is a deficient number, since it is larger than the sum of its proper divisors (218429972).

278342668 is a wasteful number, since it uses less digits than its factorization.

278342668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6897 (or 6895 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The square root of 278342668 is about 16683.6047663567. The cubic root of 278342668 is about 652.9199348063.

It can be divided in two parts, 2783 and 42668, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 278342668 in words is "two hundred seventy-eight million, three hundred forty-two thousand, six hundred sixty-eight".