767664228 has 12 divisors (see below), whose sum is σ = 1791216560. Its totient is φ = 255888072.

The previous prime is 767664221. The next prime is 767664229. The reversal of 767664228 is 822466767.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (767664221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31985998 + ... + 31986021.

Almost surely, 2^767664228 is an apocalyptic number.

It is an amenable number.

767664228 is an abundant number, since it is smaller than the sum of its proper divisors (1023552332).

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

767664228 is a wasteful number, since it uses less digits than its factorization.

767664228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63972026 (or 63972024 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 48.

The square root of 767664228 is about 27706.7541946003. The cubic root of 767664228 is about 915.6379152166.

The spelling of 767664228 in words is "seven hundred sixty-seven million, six hundred sixty-four thousand, two hundred twenty-eight".