28552972 has 48 divisors (see below), whose sum is σ = 60641280. Its totient is φ = 11491200.

The previous prime is 28552949. The next prime is 28552973. The reversal of 28552972 is 27925582.

It is a super-3 number, since 3×28552972³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28552973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101472 + ... + 101752.

It is an arithmetic number, because the mean of its divisors is an integer number (1263360).

Almost surely, 2^28552972 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 28552972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30320640).

28552972 is an abundant number, since it is smaller than the sum of its proper divisors (32088308).

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

28552972 is a wasteful number, since it uses less digits than its factorization.

28552972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 28552972 is about 5343.4981051742. The cubic root of 28552972 is about 305.6448668855.

The spelling of 28552972 in words is "twenty-eight million, five hundred fifty-two thousand, nine hundred seventy-two".