202040042440 has 16 divisors (see below), whose sum is σ = 454590095580. Its totient is φ = 80816016960.

The previous prime is 202040042383. The next prime is 202040042473. The reversal of 202040042440 is 44240040202.

It can be written as a sum of positive squares in 2 ways, for example, as 194800415044 + 7239627396 = 441362^2 + 85086^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525500491 + ... + 2525500570.

Almost surely, 2^202040042440 is an apocalyptic number.

202040042440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202040042440 is an abundant number, since it is smaller than the sum of its proper divisors (252550053140).

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

202040042440 is a wasteful number, since it uses less digits than its factorization.

202040042440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051001072 (or 5051001068 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 202040042440 its reverse (44240040202), we get a palindrome (246280082642).

The spelling of 202040042440 in words is "two hundred two billion, forty million, forty-two thousand, four hundred forty".