278889141 has 4 divisors (see below), whose sum is σ = 371852192. Its totient is φ = 185926092.

The previous prime is 278889139. The next prime is 278889161. The reversal of 278889141 is 141988872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 278889141 - 2¹ = 278889139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278889101) 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, 46481521 + ... + 46481526.

It is an arithmetic number, because the mean of its divisors is an integer number (92963048).

Almost surely, 2^278889141 is an apocalyptic number.

It is an amenable number.

278889141 is a deficient number, since it is larger than the sum of its proper divisors (92963051).

278889141 is an equidigital number, since it uses as much as digits as its factorization.

278889141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92963050.

The product of its digits is 258048, while the sum is 48.

The square root of 278889141 is about 16699.9742814173. The cubic root of 278889141 is about 653.3469502634.

The spelling of 278889141 in words is "two hundred seventy-eight million, eight hundred eighty-nine thousand, one hundred forty-one".