278344426 has 8 divisors (see below), whose sum is σ = 417587940. Its totient is φ = 139148448.

The previous prime is 278344379. The next prime is 278344427. The reversal of 278344426 is 624443872.

278344426 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 274730625 + 3613801 = 16575^2 + 1901^2 .

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 (278344427) 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, 14260 + ... + 27568.

Almost surely, 2^278344426 is an apocalyptic number.

278344426 is a deficient number, since it is larger than the sum of its proper divisors (139243514).

278344426 is a wasteful number, since it uses less digits than its factorization.

278344426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23768.

The product of its digits is 258048, while the sum is 40.

The square root of 278344426 is about 16683.6574527290. The cubic root of 278344426 is about 652.9213094079.

The spelling of 278344426 in words is "two hundred seventy-eight million, three hundred forty-four thousand, four hundred twenty-six".