77600128 has 16 divisors (see below), whose sum is σ = 154594260. Its totient is φ = 38800000.

The previous prime is 77600071. The next prime is 77600129. The reversal of 77600128 is 82100677.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 77600128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77600129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302998 + ... + 303253.

Almost surely, 2^77600128 is an apocalyptic number.

It is an amenable number.

77600128 is a deficient number, since it is larger than the sum of its proper divisors (76994132).

77600128 is an equidigital number, since it uses as much as digits as its factorization.

77600128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606265 (or 606253 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 77600128 is about 8809.0934834408. The cubic root of 77600128 is about 426.5344816216.

The spelling of 77600128 in words is "seventy-seven million, six hundred thousand, one hundred twenty-eight".