764147720 has 32 divisors (see below), whose sum is σ = 1964952000. Its totient is φ = 261993408.

The previous prime is 764147689. The next prime is 764147723. The reversal of 764147720 is 27741467.

It is not an unprimeable number, because it can be changed into a prime (764147723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1364270 + ... + 1364829.

It is an arithmetic number, because the mean of its divisors is an integer number (61404750).

Almost surely, 2^764147720 is an apocalyptic number.

764147720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

764147720 is an abundant number, since it is smaller than the sum of its proper divisors (1200804280).

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

764147720 is a wasteful number, since it uses less digits than its factorization.

764147720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729117 (or 2729113 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 764147720 is about 27643.2219540342. The cubic root of 764147720 is about 914.2376601883.

The spelling of 764147720 in words is "seven hundred sixty-four million, one hundred forty-seven thousand, seven hundred twenty".