32222640 has 160 divisors (see below), whose sum is σ = 106278912. Its totient is φ = 8064000.

The previous prime is 32222629. The next prime is 32222647. The reversal of 32222640 is 4622223.

It is not an unprimeable number, because it can be changed into a prime (32222647) 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, 453805 + ... + 453875.

Almost surely, 2^32222640 is an apocalyptic number.

32222640 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 32222640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53139456).

32222640 is an abundant number, since it is smaller than the sum of its proper divisors (74056272).

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

32222640 is a wasteful number, since it uses less digits than its factorization.

32222640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 32222640 is about 5676.4989209899. The cubic root of 32222640 is about 318.2147989066.

Adding to 32222640 its reverse (4622223), we get a palindrome (36844863).

The spelling of 32222640 in words is "thirty-two million, two hundred twenty-two thousand, six hundred forty".