28438129 has 8 divisors (see below), whose sum is σ = 29438720. Its totient is φ = 27442800.

The previous prime is 28438103. The next prime is 28438153. The reversal of 28438129 is 92183482.

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

It is a cyclic number.

It is not a de Polignac number, because 28438129 - 2⁷ = 28438001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28438159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11962 + ... + 14140.

It is an arithmetic number, because the mean of its divisors is an integer number (3679840).

Almost surely, 2^28438129 is an apocalyptic number.

It is an amenable number.

28438129 is a deficient number, since it is larger than the sum of its proper divisors (1000591).

28438129 is a wasteful number, since it uses less digits than its factorization.

28438129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631.

The product of its digits is 27648, while the sum is 37.

The square root of 28438129 is about 5332.7412275489. The cubic root of 28438129 is about 305.2345378653.

The spelling of 28438129 in words is "twenty-eight million, four hundred thirty-eight thousand, one hundred twenty-nine".