779406140 has 24 divisors (see below), whose sum is σ = 1733033232. Its totient is φ = 293423360.

The previous prime is 779406139. The next prime is 779406143. The reversal of 779406140 is 41604977.

It is a junction number, because it is equal to n+sod(n) for n = 779406094 and 779406103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779406143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1145846 + ... + 1146525.

It is an arithmetic number, because the mean of its divisors is an integer number (72209718).

Almost surely, 2^779406140 is an apocalyptic number.

It is an amenable number.

779406140 is an abundant number, since it is smaller than the sum of its proper divisors (953627092).

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

779406140 is a wasteful number, since it uses less digits than its factorization.

779406140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292397 (or 2292395 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 779406140 is about 27917.8462636357. The cubic root of 779406140 is about 920.2827344622.

The spelling of 779406140 in words is "seven hundred seventy-nine million, four hundred six thousand, one hundred forty".