40020232320 has 96 divisors (see below), whose sum is σ = 138194884620. Its totient is φ = 10672060416.

The previous prime is 40020232297. The next prime is 40020232327. The reversal of 40020232320 is 2323202004.

40020232320 is a `hidden beast` number, since 400 + 2 + 0 + 232 + 32 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37800691776 + 2219540544 = 194424^2 + 47112^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40020232293 and 40020232302.

It is not an unprimeable number, because it can be changed into a prime (40020232327) 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 11 ways as a sum of consecutive naturals, for example, 3468219 + ... + 3479738.

Almost surely, 2^40020232320 is an apocalyptic number.

40020232320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40020232320 is an abundant number, since it is smaller than the sum of its proper divisors (98174652300).

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

40020232320 is a wasteful number, since it uses less digits than its factorization.

40020232320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6947982 (or 6947967 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 40020232320 its reverse (2323202004), we get a palindrome (42343434324).

The spelling of 40020232320 in words is "forty billion, twenty million, two hundred thirty-two thousand, three hundred twenty".