80486820 has 72 divisors (see below), whose sum is σ = 245863800. Its totient is φ = 21312000.

The previous prime is 80486779. The next prime is 80486851. The reversal of 80486820 is 2868408.

It can be written as a sum of positive squares in 4 ways, for example, as 1205604 + 79281216 = 1098^2 + 8904^2 .

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

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, 25320 + ... + 28320.

It is an arithmetic number, because the mean of its divisors is an integer number (3414775).

Almost surely, 2^80486820 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 80486820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122931900).

80486820 is an abundant number, since it is smaller than the sum of its proper divisors (165376980).

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

80486820 is a wasteful number, since it uses less digits than its factorization.

80486820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165 (or 3160 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 80486820 is about 8971.4446997125. Note that the first 3 decimals coincide. The cubic root of 80486820 is about 431.7591893490.

The spelling of 80486820 in words is "eighty million, four hundred eighty-six thousand, eight hundred twenty".