80878540 has 48 divisors (see below), whose sum is σ = 174988800. Its totient is φ = 31384512.

The previous prime is 80878531. The next prime is 80878543. The reversal of 80878540 is 4587808.

It is a junction number, because it is equal to n+sod(n) for n = 80878493 and 80878502.

It is not an unprimeable number, because it can be changed into a prime (80878543) 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 15 ways as a sum of consecutive naturals, for example, 130351 + ... + 130969.

It is an arithmetic number, because the mean of its divisors is an integer number (3645600).

Almost surely, 2^80878540 is an apocalyptic number.

It is an amenable number.

80878540 is an abundant number, since it is smaller than the sum of its proper divisors (94110260).

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

80878540 is a wasteful number, since it uses less digits than its factorization.

80878540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 80878540 is about 8993.2496907403. The cubic root of 80878540 is about 432.4584966912.

It can be divided in two parts, 80878 and 540, that added together give a palindrome (81418).

The spelling of 80878540 in words is "eighty million, eight hundred seventy-eight thousand, five hundred forty".