77930776 has 144 divisors (see below), whose sum is σ = 196499520. Its totient is φ = 28828800.

The previous prime is 77930773. The next prime is 77930777. The reversal of 77930776 is 67703977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77930773) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1470366 + ... + 1470418.

It is an arithmetic number, because the mean of its divisors is an integer number (1364580).

Almost surely, 2^77930776 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 77930776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98249760).

77930776 is an abundant number, since it is smaller than the sum of its proper divisors (118568744).

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

77930776 is a wasteful number, since it uses less digits than its factorization.

77930776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 388962, while the sum is 46.

The square root of 77930776 is about 8827.8409591474. The cubic root of 77930776 is about 427.1394330992.

The spelling of 77930776 in words is "seventy-seven million, nine hundred thirty thousand, seven hundred seventy-six".