32572220 has 48 divisors (see below), whose sum is σ = 71668800. Its totient is φ = 12418560.

The previous prime is 32572219. The next prime is 32572229. The reversal of 32572220 is 2227523.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32572229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51305 + ... + 51935.

It is an arithmetic number, because the mean of its divisors is an integer number (1493100).

Almost surely, 2^32572220 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 32572220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35834400).

32572220 is an abundant number, since it is smaller than the sum of its proper divisors (39096580).

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

32572220 is a wasteful number, since it uses less digits than its factorization.

32572220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 32572220 is about 5707.2077235720. The cubic root of 32572220 is about 319.3614218412.

Adding to 32572220 its reverse (2227523), we get a palindrome (34799743).

The spelling of 32572220 in words is "thirty-two million, five hundred seventy-two thousand, two hundred twenty".