77138528 has 12 divisors (see below), whose sum is σ = 151866540. Its totient is φ = 38569248.

The previous prime is 77138519. The next prime is 77138533. The reversal of 77138528 is 82583177.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1205258 + ... + 1205321.

It is an arithmetic number, because the mean of its divisors is an integer number (12655545).

Almost surely, 2^77138528 is an apocalyptic number.

It is an amenable number.

77138528 is a deficient number, since it is larger than the sum of its proper divisors (74728012).

77138528 is a wasteful number, since it uses less digits than its factorization.

77138528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410589 (or 2410581 counting only the distinct ones).

The product of its digits is 94080, while the sum is 41.

The square root of 77138528 is about 8782.8542057807. The cubic root of 77138528 is about 425.6870603175.

The spelling of 77138528 in words is "seventy-seven million, one hundred thirty-eight thousand, five hundred twenty-eight".