40532220 has 72 divisors (see below), whose sum is σ = 124474896. Its totient is φ = 10674432.

The previous prime is 40532213. The next prime is 40532269. The reversal of 40532220 is 2223504.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40532193 and 40532202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13584 + ... + 16296.

It is an arithmetic number, because the mean of its divisors is an integer number (1728818).

Almost surely, 2^40532220 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 40532220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62237448).

40532220 is an abundant number, since it is smaller than the sum of its proper divisors (83942676).

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

40532220 is a wasteful number, since it uses less digits than its factorization.

40532220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811 (or 2806 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 40532220 is about 6366.4919696800. The cubic root of 40532220 is about 343.5053170042.

Adding to 40532220 its reverse (2223504), we get a palindrome (42755724).

The spelling of 40532220 in words is "forty million, five hundred thirty-two thousand, two hundred twenty".