77683320 has 256 divisors, whose sum is σ = 304819200. Its totient is φ = 17349120.

The previous prime is 77683297. The next prime is 77683337. The reversal of 77683320 is 2338677.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 154189 + ... + 154691.

It is an arithmetic number, because the mean of its divisors is an integer number (1190700).

Almost surely, 2^77683320 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 77683320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152409600).

77683320 is an abundant number, since it is smaller than the sum of its proper divisors (227135880).

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

77683320 is a wasteful number, since it uses less digits than its factorization.

77683320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 77683320 is about 8813.8141573328. The cubic root of 77683320 is about 426.6868507162.

The spelling of 77683320 in words is "seventy-seven million, six hundred eighty-three thousand, three hundred twenty".