80420056 has 8 divisors (see below), whose sum is σ = 150787620. Its totient is φ = 40210024.

The previous prime is 80420051. The next prime is 80420057. The reversal of 80420056 is 65002408.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 80420056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80420051) 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 as a sum of consecutive naturals, namely, 5026246 + ... + 5026261.

Almost surely, 2^80420056 is an apocalyptic number.

It is an amenable number.

80420056 is a deficient number, since it is larger than the sum of its proper divisors (70367564).

80420056 is a wasteful number, since it uses less digits than its factorization.

80420056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10052513 (or 10052509 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 80420056 is about 8967.7230108874. The cubic root of 80420056 is about 431.6397745819.

The spelling of 80420056 in words is "eighty million, four hundred twenty thousand, fifty-six".