778432 has 14 divisors (see below), whose sum is σ = 1544828. Its totient is φ = 389184.

The previous prime is 778417. The next prime is 778439. The reversal of 778432 is 234877.

It is a junction number, because it is equal to n+sod(n) for n = 778394 and 778403.

It is not an unprimeable number, because it can be changed into a prime (778439) by changing a digit.

778432 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, 6018 + ... + 6145.

2⁷⁷⁸⁴³² is an apocalyptic number.

It is an amenable number.

778432 is a deficient number, since it is larger than the sum of its proper divisors (766396).

778432 is a wasteful number, since it uses less digits than its factorization.

778432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175 (or 12165 counting only the distinct ones).

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

The square root of 778432 is about 882.2879348603. The cubic root of 778432 is about 91.9899169794.

The spelling of 778432 in words is "seven hundred seventy-eight thousand, four hundred thirty-two".