40315220 has 96 divisors (see below), whose sum is σ = 97977600. Its totient is φ = 13798400.

The previous prime is 40315189. The next prime is 40315229. The reversal of 40315220 is 2251304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40315229) 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, 452936 + ... + 453024.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 2^40315220 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 40315220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48988800).

40315220 is an abundant number, since it is smaller than the sum of its proper divisors (57662380).

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

40315220 is a wasteful number, since it uses less digits than its factorization.

40315220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 40315220 is about 6349.4267457779. The cubic root of 40315220 is about 342.8912041227.

Adding to 40315220 its reverse (2251304), we get a palindrome (42566524).

The spelling of 40315220 in words is "forty million, three hundred fifteen thousand, two hundred twenty".