80405028 has 96 divisors (see below), whose sum is σ = 231880320. Its totient is φ = 23886720.

The previous prime is 80405021. The next prime is 80405057. The reversal of 80405028 is 82050408.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 80404992 and 80405010.

It is not an unprimeable number, because it can be changed into a prime (80405021) 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, 62326 + ... + 63602.

It is an arithmetic number, because the mean of its divisors is an integer number (2415420).

Almost surely, 2^80405028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80405028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115940160).

80405028 is an abundant number, since it is smaller than the sum of its proper divisors (151475292).

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

80405028 is a wasteful number, since it uses less digits than its factorization.

80405028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 80405028 is about 8966.8850778852. The cubic root of 80405028 is about 431.6128862370.

The spelling of 80405028 in words is "eighty million, four hundred five thousand, twenty-eight".