28329136 has 40 divisors (see below), whose sum is σ = 61027344. Its totient is φ = 12629760.

The previous prime is 28329127. The next prime is 28329137. The reversal of 28329136 is 63192382.

28329136 = T₂₅₃ + T₂₅₄ + ... + T₅₇₀.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28329137) 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, 7810 + ... + 10846.

Almost surely, 2^28329136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28329136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30513672).

28329136 is an abundant number, since it is smaller than the sum of its proper divisors (32698208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28329136 is a wasteful number, since it uses less digits than its factorization.

28329136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109 (or 3103 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 28329136 is about 5322.5121888071. The cubic root of 28329136 is about 304.8440876516.

The spelling of 28329136 in words is "twenty-eight million, three hundred twenty-nine thousand, one hundred thirty-six".