278680492 has 12 divisors (see below), whose sum is σ = 491414616. Its totient is φ = 138276320.

The previous prime is 278680477. The next prime is 278680499. The reversal of 278680492 is 294086872.

278680492 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (278680499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265393 + ... + 266440.

It is an arithmetic number, because the mean of its divisors is an integer number (40951218).

Almost surely, 2^278680492 is an apocalyptic number.

It is an amenable number.

278680492 is a deficient number, since it is larger than the sum of its proper divisors (212734124).

278680492 is a wasteful number, since it uses less digits than its factorization.

278680492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531968 (or 531966 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 278680492 is about 16693.7261269017. The cubic root of 278680492 is about 653.1839772662.

The spelling of 278680492 in words is "two hundred seventy-eight million, six hundred eighty thousand, four hundred ninety-two".