778342 has 4 divisors (see below), whose sum is σ = 1167516. Its totient is φ = 389170.

The previous prime is 778333. The next prime is 778357. The reversal of 778342 is 243877.

778342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 243877 = 31 ⋅7867.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

778342 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 as a sum of consecutive naturals, namely, 194584 + ... + 194587.

It is an arithmetic number, because the mean of its divisors is an integer number (291879).

2⁷⁷⁸³⁴² is an apocalyptic number.

778342 is a deficient number, since it is larger than the sum of its proper divisors (389174).

778342 is a wasteful number, since it uses less digits than its factorization.

778342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389173.

The product of its digits is 9408, while the sum is 31.

The square root of 778342 is about 882.2369296283. The cubic root of 778342 is about 91.9863716423.

The spelling of 778342 in words is "seven hundred seventy-eight thousand, three hundred forty-two".