28231235 has 16 divisors (see below), whose sum is σ = 36495360. Its totient is φ = 20903520.

The previous prime is 28231219. The next prime is 28231243. The reversal of 28231235 is 53213282.

28231235 = T₃₇₆ + T₃₇₇ + ... + T₆₀₅.

It is not a de Polignac number, because 28231235 - 2⁴ = 28231219 is a prime.

It is an unprimeable number.

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, 395 + ... + 7524.

It is an arithmetic number, because the mean of its divisors is an integer number (2280960).

Almost surely, 2^28231235 is an apocalyptic number.

28231235 is a deficient number, since it is larger than the sum of its proper divisors (8264125).

28231235 is a wasteful number, since it uses less digits than its factorization.

28231235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7978.

The product of its digits is 2880, while the sum is 26.

The square root of 28231235 is about 5313.3073504174. The cubic root of 28231235 is about 304.4925180812.

The spelling of 28231235 in words is "twenty-eight million, two hundred thirty-one thousand, two hundred thirty-five".