764631340 has 96 divisors (see below), whose sum is σ = 1795385088. Its totient is φ = 271200000.

The previous prime is 764631331. The next prime is 764631341. The reversal of 764631340 is 43136467.

764631340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×764631340² = 1169322172220391200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 764631296 and 764631305.

It is not an unprimeable number, because it can be changed into a prime (764631341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3046215 + ... + 3046465.

It is an arithmetic number, because the mean of its divisors is an integer number (18701928).

Almost surely, 2^764631340 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 764631340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897692544).

764631340 is an abundant number, since it is smaller than the sum of its proper divisors (1030753748).

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

764631340 is a wasteful number, since it uses less digits than its factorization.

764631340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 764631340 is about 27651.9681035546. The cubic root of 764631340 is about 914.4304895600.

The spelling of 764631340 in words is "seven hundred sixty-four million, six hundred thirty-one thousand, three hundred forty".