32045440 has 128 divisors (see below), whose sum is σ = 91653120. Its totient is φ = 10475520.

The previous prime is 32045411. The next prime is 32045473. The reversal of 32045440 is 4454023.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102885 + ... + 103195.

It is an arithmetic number, because the mean of its divisors is an integer number (716040).

Almost surely, 2^32045440 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 32045440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45826560).

32045440 is an abundant number, since it is smaller than the sum of its proper divisors (59607680).

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

32045440 is a wasteful number, since it uses less digits than its factorization.

32045440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 32045440 is about 5660.8691912108. The cubic root of 32045440 is about 317.6304132863.

Adding to 32045440 its reverse (4454023), we get a palindrome (36499463).

The spelling of 32045440 in words is "thirty-two million, forty-five thousand, four hundred forty".