80820040 has 64 divisors (see below), whose sum is σ = 220060800. Its totient is φ = 26078208.

The previous prime is 80820037. The next prime is 80820041. The reversal of 80820040 is 4002808.

It is a junction number, because it is equal to n+sod(n) for n = 80819993 and 80820020.

It is not an unprimeable number, because it can be changed into a prime (80820041) 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, 3730 + ... + 13249.

It is an arithmetic number, because the mean of its divisors is an integer number (3438450).

Almost surely, 2^80820040 is an apocalyptic number.

It is an amenable number.

80820040 is an abundant number, since it is smaller than the sum of its proper divisors (139240760).

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

80820040 is a wasteful number, since it uses less digits than its factorization.

80820040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17014 (or 17010 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 80820040 is about 8989.9966629582. The cubic root of 80820040 is about 432.3542048147.

Adding to 80820040 its reverse (4002808), we get a palindrome (84822848).

The spelling of 80820040 in words is "eighty million, eight hundred twenty thousand, forty".