40020303240 has 48 divisors (see below), whose sum is σ = 130065986700. Its totient is φ = 10672080768.

The previous prime is 40020303221. The next prime is 40020303241. The reversal of 40020303240 is 4230302004.

40020303240 is a `hidden beast` number, since 400 + 20 + 3 + 0 + 3 + 240 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39211128324 + 809174916 = 198018^2 + 28446^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40020303241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55583395 + ... + 55584114.

Almost surely, 2^40020303240 is an apocalyptic number.

40020303240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40020303240 is an abundant number, since it is smaller than the sum of its proper divisors (90045683460).

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

40020303240 is a wasteful number, since it uses less digits than its factorization.

40020303240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111167526 (or 111167519 counting only the distinct ones).

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

Adding to 40020303240 its reverse (4230302004), we get a palindrome (44250605244).

The spelling of 40020303240 in words is "forty billion, twenty million, three hundred three thousand, two hundred forty".