28571016 has 64 divisors (see below), whose sum is σ = 76204800. Its totient is φ = 8895488.

The previous prime is 28570961. The next prime is 28571021. The reversal of 28571016 is 61017582.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97366 + ... + 97658.

It is an arithmetic number, because the mean of its divisors is an integer number (1190700).

Almost surely, 2^28571016 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 28571016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38102400).

28571016 is an abundant number, since it is smaller than the sum of its proper divisors (47633784).

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

28571016 is a wasteful number, since it uses less digits than its factorization.

28571016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 28571016 is about 5345.1862455858. The cubic root of 28571016 is about 305.7092372383.

Adding to 28571016 its reverse (61017582), we get a palindrome (89588598).

The spelling of 28571016 in words is "twenty-eight million, five hundred seventy-one thousand, sixteen".