77943708 has 144 divisors (see below), whose sum is σ = 222899040. Its totient is φ = 23721984.

The previous prime is 77943689. The next prime is 77943709. The reversal of 77943708 is 80734977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77943709) 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 47 ways as a sum of consecutive naturals, for example, 875728 + ... + 875816.

It is an arithmetic number, because the mean of its divisors is an integer number (1547910).

Almost surely, 2^77943708 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77943708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111449520).

77943708 is an abundant number, since it is smaller than the sum of its proper divisors (144955332).

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

77943708 is a wasteful number, since it uses less digits than its factorization.

77943708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 77943708 is about 8828.5733841884. The cubic root of 77943708 is about 427.1630586034.

The spelling of 77943708 in words is "seventy-seven million, nine hundred forty-three thousand, seven hundred eight".