28038432 has 48 divisors (see below), whose sum is σ = 74384352. Its totient is φ = 9246720.

The previous prime is 28038421. The next prime is 28038499. The reversal of 28038432 is 23483082.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28038432.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7807 + ... + 10817.

It is an arithmetic number, because the mean of its divisors is an integer number (1549674).

Almost surely, 2^28038432 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 28038432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37192176).

28038432 is an abundant number, since it is smaller than the sum of its proper divisors (46345920).

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

28038432 is a wasteful number, since it uses less digits than its factorization.

28038432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121 (or 3113 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 28038432 is about 5295.1328595230. The cubic root of 28038432 is about 303.7977648471.

The spelling of 28038432 in words is "twenty-eight million, thirty-eight thousand, four hundred thirty-two".