146891728 has 20 divisors (see below), whose sum is σ = 294417540. Its totient is φ = 70913024.

The previous prime is 146891707. The next prime is 146891737. The reversal of 146891728 is 827198641.

It can be written as a sum of positive squares in 2 ways, for example, as 113806224 + 33085504 = 10668^2 + 5752^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 157825 + ... + 158752.

It is an arithmetic number, because the mean of its divisors is an integer number (14720877).

Almost surely, 2^146891728 is an apocalyptic number.

It is an amenable number.

146891728 is an abundant number, since it is smaller than the sum of its proper divisors (147525812).

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

146891728 is a wasteful number, since it uses less digits than its factorization.

146891728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316614 (or 316608 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 146891728 is about 12119.8897684756. The cubic root of 146891728 is about 527.6336033186.

The spelling of 146891728 in words is "one hundred forty-six million, eight hundred ninety-one thousand, seven hundred twenty-eight".