764387712 has 128 divisors (see below), whose sum is σ = 2461219200. Its totient is φ = 231621120.

The previous prime is 764387669. The next prime is 764387717. The reversal of 764387712 is 217783467.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764387717) 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, 27963 + ... + 48069.

It is an arithmetic number, because the mean of its divisors is an integer number (19228275).

Almost surely, 2^764387712 is an apocalyptic number.

764387712 is a gapful number since it is divisible by the number (72) 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 764387712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230609600).

764387712 is an abundant number, since it is smaller than the sum of its proper divisors (1696831488).

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

764387712 is a wasteful number, since it uses less digits than its factorization.

764387712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20141 (or 20123 counting only the distinct ones).

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

The square root of 764387712 is about 27647.5624965385. The cubic root of 764387712 is about 914.3333601658. Note that the first 4 decimals are identical.

The spelling of 764387712 in words is "seven hundred sixty-four million, three hundred eighty-seven thousand, seven hundred twelve".