28171962 has 144 divisors (see below), whose sum is σ = 79934400. Its totient is φ = 7429968.

The previous prime is 28171951. The next prime is 28171967. The reversal of 28171962 is 26917182.

Its product of digits (12096) is a multiple of the sum of its prime factors (64).

It is not an unprimeable number, because it can be changed into a prime (28171967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2167068 + ... + 2167080.

It is an arithmetic number, because the mean of its divisors is an integer number (555100).

Almost surely, 2^28171962 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28171962, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39967200).

28171962 is an abundant number, since it is smaller than the sum of its proper divisors (51762438).

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

28171962 is an equidigital number, since it uses as much as digits as its factorization.

28171962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 25 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 28171962 is about 5307.7266319960. The cubic root of 28171962 is about 304.2792692828.

The spelling of 28171962 in words is "twenty-eight million, one hundred seventy-one thousand, nine hundred sixty-two".