77763228 has 12 divisors (see below), whose sum is σ = 181447560. Its totient is φ = 25921072.

The previous prime is 77763223. The next prime is 77763269. The reversal of 77763228 is 82236777.

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

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 77763228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77763223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3240123 + ... + 3240146.

It is an arithmetic number, because the mean of its divisors is an integer number (15120630).

Almost surely, 2^77763228 is an apocalyptic number.

It is an amenable number.

77763228 is an abundant number, since it is smaller than the sum of its proper divisors (103684332).

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

77763228 is a wasteful number, since it uses less digits than its factorization.

77763228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6480276 (or 6480274 counting only the distinct ones).

The product of its digits is 197568, while the sum is 42.

The square root of 77763228 is about 8818.3461034369. The cubic root of 77763228 is about 426.8331026565.

The spelling of 77763228 in words is "seventy-seven million, seven hundred sixty-three thousand, two hundred twenty-eight".