28431141 has 4 divisors (see below), whose sum is σ = 37908192. Its totient is φ = 18954092.

The previous prime is 28431113. The next prime is 28431167. The reversal of 28431141 is 14113482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28431141 - 2¹⁵ = 28398373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28431541) 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 3 ways as a sum of consecutive naturals, for example, 4738521 + ... + 4738526.

It is an arithmetic number, because the mean of its divisors is an integer number (9477048).

Almost surely, 2^28431141 is an apocalyptic number.

It is an amenable number.

28431141 is a deficient number, since it is larger than the sum of its proper divisors (9477051).

28431141 is an equidigital number, since it uses as much as digits as its factorization.

28431141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9477050.

The product of its digits is 768, while the sum is 24.

The square root of 28431141 is about 5332.0859895542. The cubic root of 28431141 is about 305.2095344192.

The spelling of 28431141 in words is "twenty-eight million, four hundred thirty-one thousand, one hundred forty-one".