40036220 has 96 divisors (see below), whose sum is σ = 101122560. Its totient is φ = 13029120.

The previous prime is 40036189. The next prime is 40036247. The reversal of 40036220 is 2263004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 305555 + ... + 305685.

It is an arithmetic number, because the mean of its divisors is an integer number (1053360).

Almost surely, 2^40036220 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 40036220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50561280).

40036220 is an abundant number, since it is smaller than the sum of its proper divisors (61086340).

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

40036220 is a wasteful number, since it uses less digits than its factorization.

40036220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40036220 is about 6327.4181148396. The cubic root of 40036220 is about 342.0983837421.

Adding to 40036220 its reverse (2263004), we get a palindrome (42299224).

The spelling of 40036220 in words is "forty million, thirty-six thousand, two hundred twenty".