32520040 has 128 divisors (see below), whose sum is σ = 89084160. Its totient is φ = 10450944.

The previous prime is 32520017. The next prime is 32520067. The reversal of 32520040 is 4002523.

It is a junction number, because it is equal to n+sod(n) for n = 32519996 and 32520023.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 445444 + ... + 445516.

It is an arithmetic number, because the mean of its divisors is an integer number (695970).

Almost surely, 2^32520040 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 32520040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44542080).

32520040 is an abundant number, since it is smaller than the sum of its proper divisors (56564120).

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

32520040 is a wasteful number, since it uses less digits than its factorization.

32520040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 32520040 is about 5702.6344789053. The cubic root of 32520040 is about 319.1907939715.

Adding to 32520040 its reverse (4002523), we get a palindrome (36522563).

The spelling of 32520040 in words is "thirty-two million, five hundred twenty thousand, forty".