77387986 has 16 divisors (see below), whose sum is σ = 125161344. Its totient is φ = 35674704.

The previous prime is 77387977. The next prime is 77387987. The reversal of 77387986 is 68978377.

It is not an unprimeable number, because it can be changed into a prime (77387987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33381 + ... + 35623.

It is an arithmetic number, because the mean of its divisors is an integer number (7822584).

Almost surely, 2^77387986 is an apocalyptic number.

77387986 is a deficient number, since it is larger than the sum of its proper divisors (47773358).

77387986 is a wasteful number, since it uses less digits than its factorization.

77387986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585.

The product of its digits is 3556224, while the sum is 55.

The square root of 77387986 is about 8797.0441626719. The cubic root of 77387986 is about 426.1454424878.

The spelling of 77387986 in words is "seventy-seven million, three hundred eighty-seven thousand, nine hundred eighty-six".