778042 has 16 divisors (see below), whose sum is σ = 1219680. Its totient is φ = 371952.

The previous prime is 778027. The next prime is 778049. The reversal of 778042 is 240877.

It is a self number, because there is not a number n which added to its sum of digits gives 778042.

It is not an unprimeable number, because it can be changed into a prime (778049) by changing a digit.

778042 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7084 + ... + 7192.

It is an arithmetic number, because the mean of its divisors is an integer number (76230).

2⁷⁷⁸⁰⁴² is an apocalyptic number.

778042 is a deficient number, since it is larger than the sum of its proper divisors (441638).

778042 is a wasteful number, since it uses less digits than its factorization.

778042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 778042 is about 882.0668908875. The cubic root of 778042 is about 91.9745518776.

The spelling of 778042 in words is "seven hundred seventy-eight thousand, forty-two".