77796930 has 64 divisors (see below), whose sum is σ = 199749888. Its totient is φ = 19322880.

The previous prime is 77796919. The next prime is 77796931. The reversal of 77796930 is 3969777.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77796930.

It is not an unprimeable number, because it can be changed into a prime (77796931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51790 + ... + 53270.

It is an arithmetic number, because the mean of its divisors is an integer number (3121092).

Almost surely, 2^77796930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77796930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99874944).

77796930 is an abundant number, since it is smaller than the sum of its proper divisors (121952958).

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

77796930 is a wasteful number, since it uses less digits than its factorization.

77796930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 500094, while the sum is 48.

The square root of 77796930 is about 8820.2567989827. The cubic root of 77796930 is about 426.8947558395.

The spelling of 77796930 in words is "seventy-seven million, seven hundred ninety-six thousand, nine hundred thirty".