80146728 has 24 divisors (see below), whose sum is σ = 217064250. Its totient is φ = 26715552.

The previous prime is 80146679. The next prime is 80146733. The reversal of 80146728 is 82764108.

It can be written as a sum of positive squares in only one way, i.e., 79602084 + 544644 = 8922^2 + 738^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 80146692 and 80146701.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556503 + ... + 556646.

Almost surely, 2^80146728 is an apocalyptic number.

It is an amenable number.

80146728 is an abundant number, since it is smaller than the sum of its proper divisors (136917522).

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

80146728 is a wasteful number, since it uses less digits than its factorization.

80146728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113161 (or 1113154 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 80146728 is about 8952.4704970192. The cubic root of 80146728 is about 431.1502070290.

The spelling of 80146728 in words is "eighty million, one hundred forty-six thousand, seven hundred twenty-eight".