80573540 has 24 divisors (see below), whose sum is σ = 179158392. Its totient is φ = 30333440.

The previous prime is 80573503. The next prime is 80573543. The reversal of 80573540 is 4537508.

80573540 = 225² + 226² + ... + 632².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3976036 + 76597504 = 1994^2 + 8752^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80573497 and 80573506.

It is not an unprimeable number, because it can be changed into a prime (80573543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118151 + ... + 118830.

It is an arithmetic number, because the mean of its divisors is an integer number (7464933).

Almost surely, 2^80573540 is an apocalyptic number.

It is an amenable number.

80573540 is an abundant number, since it is smaller than the sum of its proper divisors (98584852).

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

80573540 is a wasteful number, since it uses less digits than its factorization.

80573540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237007 (or 237005 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 80573540 is about 8976.2765108925. The cubic root of 80573540 is about 431.9141990665.

The spelling of 80573540 in words is "eighty million, five hundred seventy-three thousand, five hundred forty".