77729814 has 32 divisors (see below), whose sum is σ = 182895840. Its totient is φ = 24385536.

The previous prime is 77729807. The next prime is 77729833. The reversal of 77729814 is 41892777.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77729814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41419 + ... + 43254.

It is an arithmetic number, because the mean of its divisors is an integer number (5715495).

Almost surely, 2^77729814 is an apocalyptic number.

77729814 is an abundant number, since it is smaller than the sum of its proper divisors (105166026).

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

77729814 is a wasteful number, since it uses less digits than its factorization.

77729814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84701 (or 84695 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 77729814 is about 8816.4513269229. The cubic root of 77729814 is about 426.7719587417.

The spelling of 77729814 in words is "seventy-seven million, seven hundred twenty-nine thousand, eight hundred fourteen".