778113 has 32 divisors (see below), whose sum is σ = 1382400. Its totient is φ = 422928.

The previous prime is 778111. The next prime is 778121. The reversal of 778113 is 311877.

It is not a de Polignac number, because 778113 - 2¹ = 778111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (778111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4258 + ... + 4436.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2⁷⁷⁸¹¹³ is an apocalyptic number.

It is an amenable number.

778113 is a deficient number, since it is larger than the sum of its proper divisors (604287).

778113 is a wasteful number, since it uses less digits than its factorization.

778113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 212 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 778113 is about 882.1071363502. The cubic root of 778113 is about 91.9773494963.

The spelling of 778113 in words is "seven hundred seventy-eight thousand, one hundred thirteen".