32775728 has 40 divisors (see below), whose sum is σ = 68901840. Its totient is φ = 15042560.

The previous prime is 32775719. The next prime is 32775731. The reversal of 32775728 is 82757723.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 9683 + ... + 12621.

It is an arithmetic number, because the mean of its divisors is an integer number (1722546).

Almost surely, 2^32775728 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 32775728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34450920).

32775728 is an abundant number, since it is smaller than the sum of its proper divisors (36126112).

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

32775728 is a wasteful number, since it uses less digits than its factorization.

32775728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005 (or 2999 counting only the distinct ones).

The product of its digits is 164640, while the sum is 41.

The square root of 32775728 is about 5725.0089956261. The cubic root of 32775728 is about 320.0251542726.

The spelling of 32775728 in words is "thirty-two million, seven hundred seventy-five thousand, seven hundred twenty-eight".