776806140 has 192 divisors, whose sum is σ = 2513452032. Its totient is φ = 177408000.

The previous prime is 776806139. The next prime is 776806141. The reversal of 776806140 is 41608677.

It is an interprime number because it is at equal distance from previous prime (776806139) and next prime (776806141).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776806141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1107790 + ... + 1108490.

It is an arithmetic number, because the mean of its divisors is an integer number (13090896).

Almost surely, 2^776806140 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 776806140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1256726016).

776806140 is an abundant number, since it is smaller than the sum of its proper divisors (1736645892).

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

776806140 is a wasteful number, since it uses less digits than its factorization.

776806140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 776806140 is about 27871.2421682278. The cubic root of 776806140 is about 919.2582789831.

The spelling of 776806140 in words is "seven hundred seventy-six million, eight hundred six thousand, one hundred forty".