77107640 has 16 divisors (see below), whose sum is σ = 173492280. Its totient is φ = 30843040.

The previous prime is 77107603. The next prime is 77107663. The reversal of 77107640 is 4670177.

It is a junction number, because it is equal to n+sod(n) for n = 77107597 and 77107606.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 963806 + ... + 963885.

Almost surely, 2^77107640 is an apocalyptic number.

It is an amenable number.

77107640 is an abundant number, since it is smaller than the sum of its proper divisors (96384640).

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

77107640 is a wasteful number, since it uses less digits than its factorization.

77107640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927702 (or 1927698 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 77107640 is about 8781.0956036249. The cubic root of 77107640 is about 425.6302345105.

The spelling of 77107640 in words is "seventy-seven million, one hundred seven thousand, six hundred forty".