77138586 has 48 divisors (see below), whose sum is σ = 191505600. Its totient is φ = 21982464.

The previous prime is 77138563. The next prime is 77138591. The reversal of 77138586 is 68583177.

It is a super-2 number, since 2×77138586² = 11900722900158792, which contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 82570 + ... + 83498.

It is an arithmetic number, because the mean of its divisors is an integer number (3989700).

Almost surely, 2^77138586 is an apocalyptic number.

77138586 is an abundant number, since it is smaller than the sum of its proper divisors (114367014).

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

77138586 is a wasteful number, since it uses less digits than its factorization.

77138586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603 (or 1600 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 77138586 is about 8782.8575076680. The cubic root of 77138586 is about 425.6871670080.

The spelling of 77138586 in words is "seventy-seven million, one hundred thirty-eight thousand, five hundred eighty-six".