778972 has 12 divisors (see below), whose sum is σ = 1373400. Its totient is φ = 386576.

The previous prime is 778963. The next prime is 778979. The reversal of 778972 is 279877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778979) by changing a digit.

778972 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, 58 + ... + 1249.

It is an arithmetic number, because the mean of its divisors is an integer number (114450).

2⁷⁷⁸⁹⁷² is an apocalyptic number.

It is an amenable number.

778972 is a deficient number, since it is larger than the sum of its proper divisors (594428).

778972 is a wasteful number, since it uses less digits than its factorization.

778972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460 (or 1458 counting only the distinct ones).

The product of its digits is 49392, while the sum is 40.

The square root of 778972 is about 882.5939043524. The cubic root of 778972 is about 92.0111832656.

The spelling of 778972 in words is "seven hundred seventy-eight thousand, nine hundred seventy-two".