778402 has 8 divisors (see below), whose sum is σ = 1176912. Its totient is φ = 386100.

The previous prime is 778397. The next prime is 778403. The reversal of 778402 is 204877.

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

It is not an unprimeable number, because it can be changed into a prime (778403) by changing a digit.

778402 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 3 ways as a sum of consecutive naturals, for example, 1224 + ... + 1747.

It is an arithmetic number, because the mean of its divisors is an integer number (147114).

2⁷⁷⁸⁴⁰² is an apocalyptic number.

778402 is a deficient number, since it is larger than the sum of its proper divisors (398510).

778402 is a wasteful number, since it uses less digits than its factorization.

778402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104.

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

The square root of 778402 is about 882.2709334439. The cubic root of 778402 is about 91.9887352307.

The spelling of 778402 in words is "seven hundred seventy-eight thousand, four hundred two".