28811604 has 24 divisors (see below), whose sum is σ = 69045088. Its totient is φ = 9344160.

The previous prime is 28811603. The next prime is 28811609. The reversal of 28811604 is 40611882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28811603) 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 7 ways as a sum of consecutive naturals, for example, 32002 + ... + 32889.

Almost surely, 2^28811604 is an apocalyptic number.

It is an amenable number.

28811604 is an abundant number, since it is smaller than the sum of its proper divisors (40233484).

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

28811604 is a wasteful number, since it uses less digits than its factorization.

28811604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64935 (or 64933 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28811604 is about 5367.6441759863. The cubic root of 28811604 is about 306.5649352752.

The spelling of 28811604 in words is "twenty-eight million, eight hundred eleven thousand, six hundred four".