80020000 has 60 divisors (see below), whose sum is σ = 196910406. Its totient is φ = 32000000.

The previous prime is 80019941. The next prime is 80020007. The reversal of 80020000 is 2008.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 2650384 + 77369616 = 1628^2 + 8796^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80020007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18000 + ... + 22000.

Almost surely, 2^80020000 is an apocalyptic number.

80020000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98455203).

80020000 is an abundant number, since it is smaller than the sum of its proper divisors (116890406).

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

80020000 is an equidigital number, since it uses as much as digits as its factorization.

80020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031 (or 4008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 80020000 is about 8945.3898741195. The cubic root of 80020000 is about 430.9228422594.

80020000 divided by its sum of digits (10) gives a triangular number (8002000 = T₄₀₀₀).

Adding to 80020000 its reverse (2008), we get a palindrome (80022008).

It can be divided in two parts, 800 and 20000, that multiplied together give a square (16000000 = 4000²).

The spelling of 80020000 in words is "eighty million, twenty thousand".