80878142 has 4 divisors (see below), whose sum is σ = 121317216. Its totient is φ = 40439070.

The previous prime is 80878121. The next prime is 80878151. The reversal of 80878142 is 24187808.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 80878096 and 80878105.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20219534 + ... + 20219537.

It is an arithmetic number, because the mean of its divisors is an integer number (30329304).

Almost surely, 2^80878142 is an apocalyptic number.

80878142 is a deficient number, since it is larger than the sum of its proper divisors (40439074).

80878142 is a wasteful number, since it uses less digits than its factorization.

80878142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40439073.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 80878142 is about 8993.2275630054. The cubic root of 80878142 is about 432.4577873199.

The spelling of 80878142 in words is "eighty million, eight hundred seventy-eight thousand, one hundred forty-two".