28435557 has 8 divisors (see below), whose sum is σ = 38049184. Its totient is φ = 18889488.

The previous prime is 28435549. The next prime is 28435579. The reversal of 28435557 is 75553482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28435557 - 2³ = 28435549 is a prime.

It is the 5333-rd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28435597) by changing a digit.

It is a nontrivial repunit in base 5332.

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 7 ways as a sum of consecutive naturals, for example, 15898 + ... + 17595.

It is an arithmetic number, because the mean of its divisors is an integer number (4756148).

Almost surely, 2^28435557 is an apocalyptic number.

It is an amenable number.

28435557 is a deficient number, since it is larger than the sum of its proper divisors (9613627).

28435557 is a wasteful number, since it uses less digits than its factorization.

28435557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33779.

The product of its digits is 168000, while the sum is 39.

The square root of 28435557 is about 5332.5000703235. The cubic root of 28435557 is about 305.2253355851.

The spelling of 28435557 in words is "twenty-eight million, four hundred thirty-five thousand, five hundred fifty-seven".