40503220 has 24 divisors (see below), whose sum is σ = 85312584. Its totient is φ = 16152576.

The previous prime is 40503187. The next prime is 40503233. The reversal of 40503220 is 2230504.

It can be written as a sum of positive squares in 4 ways, for example, as 206116 + 40297104 = 454^2 + 6348^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40503194 and 40503203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4192 + ... + 9928.

It is an arithmetic number, because the mean of its divisors is an integer number (3554691).

Almost surely, 2^40503220 is an apocalyptic number.

It is an amenable number.

40503220 is an abundant number, since it is smaller than the sum of its proper divisors (44809364).

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

40503220 is a wasteful number, since it uses less digits than its factorization.

40503220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6099 (or 6097 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 40503220 is about 6364.2140127434. The cubic root of 40503220 is about 343.4233737097.

Adding to 40503220 its reverse (2230504), we get a palindrome (42733724).

The spelling of 40503220 in words is "forty million, five hundred three thousand, two hundred twenty".