40303220 has 12 divisors (see below), whose sum is σ = 84636804. Its totient is φ = 16121280.

The previous prime is 40303213. The next prime is 40303229. The reversal of 40303220 is 2230304.

It can be written as a sum of positive squares in 2 ways, for example, as 31315216 + 8988004 = 5596^2 + 2998^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40303195 and 40303204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40303229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007561 + ... + 1007600.

It is an arithmetic number, because the mean of its divisors is an integer number (7053067).

Almost surely, 2^40303220 is an apocalyptic number.

It is an amenable number.

40303220 is an abundant number, since it is smaller than the sum of its proper divisors (44333584).

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

40303220 is a wasteful number, since it uses less digits than its factorization.

40303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015170 (or 2015168 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 40303220 is about 6348.4817082512. The cubic root of 40303220 is about 342.8571797288.

Adding to 40303220 its reverse (2230304), we get a palindrome (42533524).

The spelling of 40303220 in words is "forty million, three hundred three thousand, two hundred twenty".