77968782 has 24 divisors (see below), whose sum is σ = 174383040. Its totient is φ = 25151040.

The previous prime is 77968763. The next prime is 77968801. The reversal of 77968782 is 28786977.

It is an interprime number because it is at equal distance from previous prime (77968763) and next prime (77968801).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69307 + ... + 70422.

It is an arithmetic number, because the mean of its divisors is an integer number (7265960).

Almost surely, 2^77968782 is an apocalyptic number.

77968782 is an abundant number, since it is smaller than the sum of its proper divisors (96414258).

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

77968782 is a wasteful number, since it uses less digits than its factorization.

77968782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139768 (or 139765 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 77968782 is about 8829.9933182308. The cubic root of 77968782 is about 427.2088589145.

The spelling of 77968782 in words is "seventy-seven million, nine hundred sixty-eight thousand, seven hundred eighty-two".