769664420 has 48 divisors (see below), whose sum is σ = 1855338240. Its totient is φ = 262721664.

The previous prime is 769664411. The next prime is 769664447. The reversal of 769664420 is 24466967.

It is an unprimeable number.

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, 20057 + ... + 44063.

It is an arithmetic number, because the mean of its divisors is an integer number (38652880).

Almost surely, 2^769664420 is an apocalyptic number.

769664420 is a gapful number since it is divisible by the number (70) 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 769664420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (927669120).

769664420 is an abundant number, since it is smaller than the sum of its proper divisors (1085673820).

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

769664420 is a wasteful number, since it uses less digits than its factorization.

769664420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24252 (or 24250 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 769664420 is about 27742.8264601861. The cubic root of 769664420 is about 916.4324740939.

The spelling of 769664420 in words is "seven hundred sixty-nine million, six hundred sixty-four thousand, four hundred twenty".