28471332 has 48 divisors (see below), whose sum is σ = 70963200. Its totient is φ = 8863008.

The previous prime is 28471327. The next prime is 28471337. The reversal of 28471332 is 23317482.

It is an interprime number because it is at equal distance from previous prime (28471327) and next prime (28471337).

It is a self number, because there is not a number n which added to its sum of digits gives 28471332.

It is not an unprimeable number, because it can be changed into a prime (28471337) 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, 10669 + ... + 13067.

It is an arithmetic number, because the mean of its divisors is an integer number (1478400).

Almost surely, 2^28471332 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 28471332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35481600).

28471332 is an abundant number, since it is smaller than the sum of its proper divisors (42491868).

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

28471332 is a wasteful number, since it uses less digits than its factorization.

28471332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472 (or 2470 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 28471332 is about 5335.8534462633. The cubic root of 28471332 is about 305.3532840816.

The spelling of 28471332 in words is "twenty-eight million, four hundred seventy-one thousand, three hundred thirty-two".