278488042 has 8 divisors (see below), whose sum is σ = 477408096. Its totient is φ = 119352012.

The previous prime is 278488037. The next prime is 278488043. The reversal of 278488042 is 240884872.

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

It is a self number, because there is not a number n which added to its sum of digits gives 278488042.

It is not an unprimeable number, because it can be changed into a prime (278488043) 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, 9945988 + ... + 9946015.

It is an arithmetic number, because the mean of its divisors is an integer number (59676012).

Almost surely, 2^278488042 is an apocalyptic number.

278488042 is a deficient number, since it is larger than the sum of its proper divisors (198920054).

278488042 is a wasteful number, since it uses less digits than its factorization.

278488042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19892012.

The product of its (nonzero) digits is 229376, while the sum is 43.

The square root of 278488042 is about 16687.9609898873. The cubic root of 278488042 is about 653.0335849621.

The spelling of 278488042 in words is "two hundred seventy-eight million, four hundred eighty-eight thousand, forty-two".