278323201 has 16 divisors (see below), whose sum is σ = 320471424. Its totient is φ = 239433984.

The previous prime is 278323141. The next prime is 278323223. The reversal of 278323201 is 102323872.

It is not a de Polignac number, because 278323201 - 2²⁷ = 144105473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 278323201.

It is not an unprimeable number, because it can be changed into a prime (278323261) 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, 16650 + ... + 28876.

It is an arithmetic number, because the mean of its divisors is an integer number (20029464).

Almost surely, 2^278323201 is an apocalyptic number.

It is an amenable number.

278323201 is a deficient number, since it is larger than the sum of its proper divisors (42148223).

278323201 is a wasteful number, since it uses less digits than its factorization.

278323201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12360.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 278323201 is about 16683.0213390740. The cubic root of 278323201 is about 652.9047129351.

The spelling of 278323201 in words is "two hundred seventy-eight million, three hundred twenty-three thousand, two hundred one".