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28572 = 2232381

28572 has 12 divisors (see below), whose sum is σ = 66696. Its totient is φ = 9520.

The previous prime is 28571. The next prime is 28573. The reversal of 28572 is 27582.

It is an interprime number because it is at equal distance from previous prime (28571) and next prime (28573).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179 + ... + 1202.

It is an arithmetic number, because the mean of its divisors is an integer number (5558).

228572 is an apocalyptic number.

It is an amenable number.

28572 is an abundant number, since it is smaller than the sum of its proper divisors (38124).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33348).

28572 is a wasteful number, since it uses less digits than its factorization.

28572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388 (or 2386 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 28572 is about 169.0325412458. The cubic root of 28572 is about 30.5712746791.

Adding to 28572 its product of digits (1120), we get a palindrome (29692).

Subtracting from 28572 its reverse (27582), we obtain a triangular number (990 = T44).

The spelling of 28572 in words is "twenty-eight thousand, five hundred seventy-two".

Divisors: 1 2 3 4 6 12 2381 4762 7143 9524 14286 28572