634777772 has 48 divisors (see below), whose sum is σ = 1166663232. Its totient is φ = 301916160.

The previous prime is 634777771. The next prime is 634777777. The reversal of 634777772 is 277777436.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 634777772.

It is not an unprimeable number, because it can be changed into a prime (634777771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2027888 + ... + 2028200.

It is an arithmetic number, because the mean of its divisors is an integer number (24305484).

Almost surely, 2^634777772 is an apocalyptic number.

It is an amenable number.

634777772 is a deficient number, since it is larger than the sum of its proper divisors (531885460).

634777772 is a wasteful number, since it uses less digits than its factorization.

634777772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618 (or 616 counting only the distinct ones).

The product of its digits is 2420208, while the sum is 50.

The square root of 634777772 is about 25194.7965262671. The cubic root of 634777772 is about 859.4235238840.

The spelling of 634777772 in words is "six hundred thirty-four million, seven hundred seventy-seven thousand, seven hundred seventy-two".