779826420 has 96 divisors (see below), whose sum is σ = 2433594240. Its totient is φ = 207313920.

The previous prime is 779826419. The next prime is 779826433. The reversal of 779826420 is 24628977.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188575 + ... + 192665.

It is an arithmetic number, because the mean of its divisors is an integer number (25349940).

Almost surely, 2^779826420 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 779826420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1216797120).

779826420 is an abundant number, since it is smaller than the sum of its proper divisors (1653767820).

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

779826420 is a wasteful number, since it uses less digits than its factorization.

779826420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462 (or 4454 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 779826420 is about 27925.3723341337. The cubic root of 779826420 is about 920.4481197506.

The spelling of 779826420 in words is "seven hundred seventy-nine million, eight hundred twenty-six thousand, four hundred twenty".