779497216 has 36 divisors (see below), whose sum is σ = 1565352432. Its totient is φ = 387393536.

The previous prime is 779497087. The next prime is 779497217. The reversal of 779497216 is 612794977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779497217) 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, 33636 + ... + 51868.

It is an arithmetic number, because the mean of its divisors is an integer number (43482012).

Almost surely, 2^779497216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 779497216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (782676216).

779497216 is an abundant number, since it is smaller than the sum of its proper divisors (785855216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

779497216 is a wasteful number, since it uses less digits than its factorization.

779497216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18416 (or 18402 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 52.

The square root of 779497216 is about 27919.4773590051. The cubic root of 779497216 is about 920.3185790202.

The spelling of 779497216 in words is "seven hundred seventy-nine million, four hundred ninety-seven thousand, two hundred sixteen".