32012220 has 48 divisors (see below), whose sum is σ = 91163520. Its totient is φ = 8390976.

The previous prime is 32012219. The next prime is 32012257. The reversal of 32012220 is 2221023.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 32012196 and 32012205.

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, 982 + ... + 8061.

It is an arithmetic number, because the mean of its divisors is an integer number (1899240).

Almost surely, 2^32012220 is an apocalyptic number.

32012220 is a gapful number since it is divisible by the number (30) 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 32012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45581760).

32012220 is an abundant number, since it is smaller than the sum of its proper divisors (59151300).

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

32012220 is a wasteful number, since it uses less digits than its factorization.

32012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9114 (or 9112 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 32012220 is about 5657.9342520040. The cubic root of 32012220 is about 317.5206178357.

Adding to 32012220 its reverse (2221023), we get a palindrome (34233243).

The spelling of 32012220 in words is "thirty-two million, twelve thousand, two hundred twenty".