77112128 has 28 divisors (see below), whose sum is σ = 157959552. Its totient is φ = 37311360.

The previous prime is 77112121. The next prime is 77112143. The reversal of 77112128 is 82121177.

It is a self number, because there is not a number n which added to its sum of digits gives 77112128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77112121) 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, 17450 + ... + 21417.

Almost surely, 2^77112128 is an apocalyptic number.

It is an amenable number.

77112128 is an abundant number, since it is smaller than the sum of its proper divisors (80847424).

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

77112128 is a wasteful number, since it uses less digits than its factorization.

77112128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38910 (or 38900 counting only the distinct ones).

The product of its digits is 1568, while the sum is 29.

The square root of 77112128 is about 8781.3511488836. The cubic root of 77112128 is about 425.6384921939.

The spelling of 77112128 in words is "seventy-seven million, one hundred twelve thousand, one hundred twenty-eight".