278307242 has 8 divisors (see below), whose sum is σ = 417873600. Its totient is φ = 139016044.

The previous prime is 278307241. The next prime is 278307247. The reversal of 278307242 is 242703872.

278307242 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (278307241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66242 + ... + 70317.

It is an arithmetic number, because the mean of its divisors is an integer number (52234200).

Almost surely, 2^278307242 is an apocalyptic number.

278307242 is a deficient number, since it is larger than the sum of its proper divisors (139566358).

278307242 is a wasteful number, since it uses less digits than its factorization.

278307242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137580.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 278307242 is about 16682.5430315645. The cubic root of 278307242 is about 652.8922335521.

The spelling of 278307242 in words is "two hundred seventy-eight million, three hundred seven thousand, two hundred forty-two".