28435641 has 16 divisors (see below), whose sum is σ = 41240640. Its totient is φ = 17323200.

The previous prime is 28435639. The next prime is 28435651. The reversal of 28435641 is 14653482.

It is not a de Polignac number, because 28435641 - 2¹ = 28435639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28435601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330 + ... + 7548.

It is an arithmetic number, because the mean of its divisors is an integer number (2577540).

Almost surely, 2^28435641 is an apocalyptic number.

It is an amenable number.

28435641 is a deficient number, since it is larger than the sum of its proper divisors (12804999).

28435641 is a wasteful number, since it uses less digits than its factorization.

28435641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7336.

The product of its digits is 23040, while the sum is 33.

The square root of 28435641 is about 5332.5079465482. The cubic root of 28435641 is about 305.2256361349.

The spelling of 28435641 in words is "twenty-eight million, four hundred thirty-five thousand, six hundred forty-one".