28354688 has 64 divisors (see below), whose sum is σ = 60588000. Its totient is φ = 13178880.

The previous prime is 28354681. The next prime is 28354693. The reversal of 28354688 is 88645382.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (28354681) 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, 216383 + ... + 216513.

Almost surely, 2^28354688 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 28354688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30294000).

28354688 is an abundant number, since it is smaller than the sum of its proper divisors (32233312).

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

28354688 is a wasteful number, since it uses less digits than its factorization.

28354688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 241 counting only the distinct ones).

The product of its digits is 368640, while the sum is 44.

The square root of 28354688 is about 5324.9120180525. The cubic root of 28354688 is about 304.9357134060.

The spelling of 28354688 in words is "twenty-eight million, three hundred fifty-four thousand, six hundred eighty-eight".