28573872 has 120 divisors (see below), whose sum is σ = 83338416. Its totient is φ = 8404992.

The previous prime is 28573859. The next prime is 28573873. The reversal of 28573872 is 27837582.

It is a super-2 number, since 2×28573872² = 1632932322144768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28573873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 294528 + ... + 294624.

Almost surely, 2^28573872 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 28573872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41669208).

28573872 is an abundant number, since it is smaller than the sum of its proper divisors (54764544).

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

28573872 is a wasteful number, since it uses less digits than its factorization.

28573872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 138 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 28573872 is about 5345.4533951761. The cubic root of 28573872 is about 305.7194232777.

The spelling of 28573872 in words is "twenty-eight million, five hundred seventy-three thousand, eight hundred seventy-two".