278886042 has 24 divisors (see below), whose sum is σ = 605051616. Its totient is φ = 92839176.

The previous prime is 278885939. The next prime is 278886077. The reversal of 278886042 is 240688872.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4323 + ... + 24009.

It is an arithmetic number, because the mean of its divisors is an integer number (25210484).

Almost surely, 2^278886042 is an apocalyptic number.

278886042 is an abundant number, since it is smaller than the sum of its proper divisors (326165574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278886042 is a wasteful number, since it uses less digits than its factorization.

278886042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20482 (or 20479 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 278886042 is about 16699.8814965855. The cubic root of 278886042 is about 653.3445302699.

It can be divided in two parts, 27888 and 6042, that added together give a triangular number (33930 = T₂₆₀).

The spelling of 278886042 in words is "two hundred seventy-eight million, eight hundred eighty-six thousand, forty-two".