779976 has 64 divisors (see below), whose sum is σ = 2275200. Its totient is φ = 247104.

The previous prime is 779971. The next prime is 779981. The reversal of 779976 is 679977.

It is an interprime number because it is at equal distance from previous prime (779971) and next prime (779981).

It is not an unprimeable number, because it can be changed into a prime (779971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4890 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (35550).

2⁷⁷⁹⁹⁷⁶ 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 779976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1137600).

779976 is an abundant number, since it is smaller than the sum of its proper divisors (1495224).

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

779976 is a wasteful number, since it uses less digits than its factorization.

779976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 185 counting only the distinct ones).

The product of its digits is 166698, while the sum is 45.

The square root of 779976 is about 883.1624992039. The cubic root of 779976 is about 92.0506966961.

Subtracting from 779976 its product of digits (166698), we obtain a triangular number (613278 = T₁₁₀₇).

Subtracting from 779976 its reverse (679977), we obtain a palindrome (99999).

It can be divided in two parts, 7799 and 76, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 779976 in words is "seven hundred seventy-nine thousand, nine hundred seventy-six".