28167636 has 48 divisors (see below), whose sum is σ = 75910016. Its totient is φ = 7962624.

The previous prime is 28167631. The next prime is 28167641. The reversal of 28167636 is 63676182.

It is an interprime number because it is at equal distance from previous prime (28167631) and next prime (28167641).

It is a junction number, because it is equal to n+sod(n) for n = 28167594 and 28167603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28167631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6420 + ... + 9876.

Almost surely, 2^28167636 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 28167636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37955008).

28167636 is an abundant number, since it is smaller than the sum of its proper divisors (47742380).

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

28167636 is a wasteful number, since it uses less digits than its factorization.

28167636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568 (or 3566 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 28167636 is about 5307.3190972467. The cubic root of 28167636 is about 304.2636937554.

The spelling of 28167636 in words is "twenty-eight million, one hundred sixty-seven thousand, six hundred thirty-six".