763663720 has 64 divisors (see below), whose sum is σ = 1770958080. Its totient is φ = 296153856.

The previous prime is 763663709. The next prime is 763663721. The reversal of 763663720 is 27366367.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (763663721) 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 15 ways as a sum of consecutive naturals, for example, 512817 + ... + 514303.

It is an arithmetic number, because the mean of its divisors is an integer number (27671220).

Almost surely, 2^763663720 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 763663720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885479040).

763663720 is an abundant number, since it is smaller than the sum of its proper divisors (1007294360).

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

763663720 is a wasteful number, since it uses less digits than its factorization.

763663720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882 (or 1878 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 40.

The square root of 763663720 is about 27634.4661609375. The cubic root of 763663720 is about 914.0445978299.

The spelling of 763663720 in words is "seven hundred sixty-three million, six hundred sixty-three thousand, seven hundred twenty".