772686720 has 384 divisors, whose sum is σ = 3047466240. Its totient is φ = 178716672.

The previous prime is 772686659. The next prime is 772686751. The reversal of 772686720 is 27686277.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

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

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1272657 + ... + 1273263.

It is an arithmetic number, because the mean of its divisors is an integer number (7936110).

Almost surely, 2^772686720 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 772686720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1523733120).

772686720 is an abundant number, since it is smaller than the sum of its proper divisors (2274779520).

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

772686720 is a wasteful number, since it uses less digits than its factorization.

772686720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 772686720 is about 27797.2430287610. The cubic root of 772686720 is about 917.6304491715.

The spelling of 772686720 in words is "seven hundred seventy-two million, six hundred eighty-six thousand, seven hundred twenty".