77028128 has 24 divisors (see below), whose sum is σ = 159631920. Its totient is φ = 36486720.

The previous prime is 77028079. The next prime is 77028143. The reversal of 77028128 is 82182077.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62738 + ... + 63953.

It is an arithmetic number, because the mean of its divisors is an integer number (6651330).

Almost surely, 2^77028128 is an apocalyptic number.

It is an amenable number.

77028128 is an abundant number, since it is smaller than the sum of its proper divisors (82603792).

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

77028128 is a wasteful number, since it uses less digits than its factorization.

77028128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126720 (or 126712 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 77028128 is about 8776.5669825963. The cubic root of 77028128 is about 425.4838834678.

The spelling of 77028128 in words is "seventy-seven million, twenty-eight thousand, one hundred twenty-eight".