77638882 has 16 divisors (see below), whose sum is σ = 117771192. Its totient is φ = 38384640.

The previous prime is 77638843. The next prime is 77638903. The reversal of 77638882 is 28883677.

It can be written as a sum of positive squares in 4 ways, for example, as 75533481 + 2105401 = 8691^2 + 1451^2 .

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 7 ways as a sum of consecutive naturals, for example, 75532 + ... + 76552.

Almost surely, 2^77638882 is an apocalyptic number.

77638882 is a deficient number, since it is larger than the sum of its proper divisors (40132310).

77638882 is a wasteful number, since it uses less digits than its factorization.

77638882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413.

The product of its digits is 903168, while the sum is 49.

The square root of 77638882 is about 8811.2928676784. The cubic root of 77638882 is about 426.6054744871.

The spelling of 77638882 in words is "seventy-seven million, six hundred thirty-eight thousand, eight hundred eighty-two".