28429193 has 16 divisors (see below), whose sum is σ = 32136720. Its totient is φ = 24966144.

The previous prime is 28429171. The next prime is 28429207. The reversal of 28429193 is 39192482.

It can be written as a sum of positive squares in 8 ways, for example, as 635209 + 27793984 = 797^2 + 5272^2 .

It is a cyclic number.

It is not a de Polignac number, because 28429193 - 2¹² = 28425097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28429123) 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 in 15 ways as a sum of consecutive naturals, for example, 27005 + ... + 28037.

It is an arithmetic number, because the mean of its divisors is an integer number (2008545).

Almost surely, 2^28429193 is an apocalyptic number.

It is an amenable number.

28429193 is a deficient number, since it is larger than the sum of its proper divisors (3707527).

28429193 is a wasteful number, since it uses less digits than its factorization.

28429193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its digits is 31104, while the sum is 38.

The square root of 28429193 is about 5331.9033187034. The cubic root of 28429193 is about 305.2025636384.

The spelling of 28429193 in words is "twenty-eight million, four hundred twenty-nine thousand, one hundred ninety-three".