28573668 has 96 divisors (see below), whose sum is σ = 79833600. Its totient is φ = 8805888.

The previous prime is 28573667. The next prime is 28573669. The reversal of 28573668 is 86637582.

28573668 is a `hidden beast` number, since 285 + 7 + 366 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (28573667) and next prime (28573669).

It is not an unprimeable number, because it can be changed into a prime (28573667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144946 + ... + 145142.

It is an arithmetic number, because the mean of its divisors is an integer number (831600).

Almost surely, 2^28573668 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 28573668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39916800).

28573668 is an abundant number, since it is smaller than the sum of its proper divisors (51259932).

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

28573668 is a wasteful number, since it uses less digits than its factorization.

28573668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 298 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 28573668 is about 5345.4343135053. The cubic root of 28573668 is about 305.7186957260.

It can be divided in two parts, 28573 and 668, that added together give a square (29241 = 171²).

The spelling of 28573668 in words is "twenty-eight million, five hundred seventy-three thousand, six hundred sixty-eight".