778630 has 8 divisors (see below), whose sum is σ = 1401552. Its totient is φ = 311448.

The previous prime is 778597. The next prime is 778633. The reversal of 778630 is 36877.

778630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 778592 and 778601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778633) 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, 38922 + ... + 38941.

It is an arithmetic number, because the mean of its divisors is an integer number (175194).

2⁷⁷⁸⁶³⁰ is an apocalyptic number.

778630 is a deficient number, since it is larger than the sum of its proper divisors (622922).

778630 is a wasteful number, since it uses less digits than its factorization.

778630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77870.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 778630 is about 882.4001359927. The cubic root of 778630 is about 91.9977157593.

The spelling of 778630 in words is "seven hundred seventy-eight thousand, six hundred thirty".