80777320 has 64 divisors (see below), whose sum is σ = 202083840. Its totient is φ = 28857600.

The previous prime is 80777297. The next prime is 80777321. The reversal of 80777320 is 2377708.

It is not an unprimeable number, because it can be changed into a prime (80777321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13615 + ... + 18625.

It is an arithmetic number, because the mean of its divisors is an integer number (3157560).

Almost surely, 2^80777320 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 80777320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101041920).

80777320 is an abundant number, since it is smaller than the sum of its proper divisors (121306520).

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

80777320 is a wasteful number, since it uses less digits than its factorization.

80777320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5066 (or 5062 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 80777320 is about 8987.6203747154. The cubic root of 80777320 is about 432.2780132047.

The spelling of 80777320 in words is "eighty million, seven hundred seventy-seven thousand, three hundred twenty".