32220240 has 160 divisors (see below), whose sum is σ = 112492800. Its totient is φ = 7569408.

The previous prime is 32220187. The next prime is 32220241. The reversal of 32220240 is 4202223.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32220241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71536 + ... + 71984.

It is an arithmetic number, because the mean of its divisors is an integer number (703080).

Almost surely, 2^32220240 is an apocalyptic number.

32220240 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 32220240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56246400).

32220240 is an abundant number, since it is smaller than the sum of its proper divisors (80272560).

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

32220240 is a wasteful number, since it uses less digits than its factorization.

32220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 32220240 is about 5676.2875191449. The cubic root of 32220240 is about 318.2068983075.

Adding to 32220240 its reverse (4202223), we get a palindrome (36422463).

The spelling of 32220240 in words is "thirty-two million, two hundred twenty thousand, two hundred forty".