80420879 has 32 divisors (see below), whose sum is σ = 104011776. Its totient is φ = 60369120.

The previous prime is 80420867. The next prime is 80420909. The reversal of 80420879 is 97802408.

It is not a de Polignac number, because 80420879 - 2¹⁶ = 80355343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80420819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354164 + ... + 354390.

It is an arithmetic number, because the mean of its divisors is an integer number (3250368).

Almost surely, 2^80420879 is an apocalyptic number.

80420879 is a deficient number, since it is larger than the sum of its proper divisors (23590897).

80420879 is a wasteful number, since it uses less digits than its factorization.

80420879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 80420879 is about 8967.7688975575. The cubic root of 80420879 is about 431.6412470103.

The spelling of 80420879 in words is "eighty million, four hundred twenty thousand, eight hundred seventy-nine".