32216440 has 32 divisors (see below), whose sum is σ = 74828160. Its totient is φ = 12470400.

The previous prime is 32216423. The next prime is 32216441. The reversal of 32216440 is 4461223.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32216441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11751 + ... + 14230.

It is an arithmetic number, because the mean of its divisors is an integer number (2338380).

Almost surely, 2^32216440 is an apocalyptic number.

It is an amenable number.

32216440 is an abundant number, since it is smaller than the sum of its proper divisors (42611720).

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

32216440 is a wasteful number, since it uses less digits than its factorization.

32216440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26023 (or 26019 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 32216440 is about 5675.9527834541. The cubic root of 32216440 is about 318.1943882233.

Adding to 32216440 its reverse (4461223), we get a palindrome (36677663).

The spelling of 32216440 in words is "thirty-two million, two hundred sixteen thousand, four hundred forty".