28075432 has 96 divisors (see below), whose sum is σ = 70917120. Its totient is φ = 10268160.

The previous prime is 28075427. The next prime is 28075471. The reversal of 28075432 is 23457082.

It is a junction number, because it is equal to n+sod(n) for n = 28075394 and 28075403.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73113 + ... + 73495.

It is an arithmetic number, because the mean of its divisors is an integer number (738720).

Almost surely, 2^28075432 is an apocalyptic number.

28075432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28075432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35458560).

28075432 is an abundant number, since it is smaller than the sum of its proper divisors (42841688).

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

28075432 is a wasteful number, since it uses less digits than its factorization.

28075432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 28075432 is about 5298.6254821416. The cubic root of 28075432 is about 303.9313383713.

The spelling of 28075432 in words is "twenty-eight million, seventy-five thousand, four hundred thirty-two".