776303640 has 192 divisors, whose sum is σ = 3053194560. Its totient is φ = 166993920.

The previous prime is 776303609. The next prime is 776303641. The reversal of 776303640 is 46303677.

776303640 is a `hidden beast` number, since 7 + 7 + 6 + 3 + 0 + 3 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 776303595 and 776303604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776303641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33780 + ... + 51900.

It is an arithmetic number, because the mean of its divisors is an integer number (15902055).

Almost surely, 2^776303640 is an apocalyptic number.

776303640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 776303640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1526597280).

776303640 is an abundant number, since it is smaller than the sum of its proper divisors (2276890920).

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

776303640 is a wasteful number, since it uses less digits than its factorization.

776303640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18162 (or 18155 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 36.

The square root of 776303640 is about 27862.2260417218. The cubic root of 776303640 is about 919.0600197689.

The spelling of 776303640 in words is "seven hundred seventy-six million, three hundred three thousand, six hundred forty".