28432992 has 96 divisors (see below), whose sum is σ = 88300800. Its totient is φ = 7838208.

The previous prime is 28432981. The next prime is 28432997. The reversal of 28432992 is 29923482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 28432992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28432997) 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, 18759 + ... + 20217.

It is an arithmetic number, because the mean of its divisors is an integer number (919800).

Almost surely, 2^28432992 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 28432992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44150400).

28432992 is an abundant number, since it is smaller than the sum of its proper divisors (59867808).

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

28432992 is a wasteful number, since it uses less digits than its factorization.

28432992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508 (or 1500 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 28432992 is about 5332.2595585736. The cubic root of 28432992 is about 305.2161577972.

The spelling of 28432992 in words is "twenty-eight million, four hundred thirty-two thousand, nine hundred ninety-two".