28438235 has 16 divisors (see below), whose sum is σ = 40697856. Its totient is φ = 18652128.

The previous prime is 28438213. The next prime is 28438247. The reversal of 28438235 is 53283482.

It is a cyclic number.

It is not a de Polignac number, because 28438235 - 2⁶ = 28438171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a junction number, because it is equal to n+sod(n) for n = 28438195 and 28438204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16859 + ... + 18468.

It is an arithmetic number, because the mean of its divisors is an integer number (2543616).

Almost surely, 2^28438235 is an apocalyptic number.

28438235 is a deficient number, since it is larger than the sum of its proper divisors (12259621).

28438235 is a wasteful number, since it uses less digits than its factorization.

28438235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35362.

The product of its digits is 46080, while the sum is 35.

The square root of 28438235 is about 5332.7511661430. The cubic root of 28438235 is about 305.2349171076.

The spelling of 28438235 in words is "twenty-eight million, four hundred thirty-eight thousand, two hundred thirty-five".