80771860 has 72 divisors (see below), whose sum is σ = 191842560. Its totient is φ = 28499328.

The previous prime is 80771843. The next prime is 80771893. The reversal of 80771860 is 6817708.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77221 + ... + 78259.

It is an arithmetic number, because the mean of its divisors is an integer number (2664480).

Almost surely, 2^80771860 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 80771860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95921280).

80771860 is an abundant number, since it is smaller than the sum of its proper divisors (111070700).

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

80771860 is a wasteful number, since it uses less digits than its factorization.

80771860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 80771860 is about 8987.3166184351. The cubic root of 80771860 is about 432.2682732961.

The spelling of 80771860 in words is "eighty million, seven hundred seventy-one thousand, eight hundred sixty".