40323220 has 24 divisors (see below), whose sum is σ = 96776064. Its totient is φ = 13825056.

The previous prime is 40323211. The next prime is 40323221. The reversal of 40323220 is 2232304.

It is a junction number, because it is equal to n+sod(n) for n = 40323194 and 40323203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40323221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143872 + ... + 144151.

It is an arithmetic number, because the mean of its divisors is an integer number (4032336).

Almost surely, 2^40323220 is an apocalyptic number.

It is an amenable number.

40323220 is an abundant number, since it is smaller than the sum of its proper divisors (56452844).

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

40323220 is a wasteful number, since it uses less digits than its factorization.

40323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288039 (or 288037 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 40323220 is about 6350.0566926603. The cubic root of 40323220 is about 342.9138833011.

Adding to 40323220 its reverse (2232304), we get a palindrome (42555524).

The spelling of 40323220 in words is "forty million, three hundred twenty-three thousand, two hundred twenty".