402040200040 has 32 divisors (see below), whose sum is σ = 913546800360. Its totient is φ = 159223840000.

The previous prime is 402040200007. The next prime is 402040200047. The reversal of 402040200040 is 40002040204.

It can be written as a sum of positive squares in 4 ways, for example, as 385613676484 + 16426523556 = 620978^2 + 128166^2 .

It is a junction number, because it is equal to n+sod(n) for n = 402040199987 and 402040200023.

It is not an unprimeable number, because it can be changed into a prime (402040200047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49753411 + ... + 49761490.

Almost surely, 2^402040200040 is an apocalyptic number.

402040200040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402040200040 is an abundant number, since it is smaller than the sum of its proper divisors (511506600320).

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

402040200040 is a wasteful number, since it uses less digits than its factorization.

402040200040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99515013 (or 99515009 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 402040200040 its reverse (40002040204), we get a palindrome (442042240244).

The spelling of 402040200040 in words is "four hundred two billion, forty million, two hundred thousand, forty".