400202002040 has 64 divisors (see below), whose sum is σ = 927246942720. Its totient is φ = 155358592000.

The previous prime is 400202002027. The next prime is 400202002069. The reversal of 400202002040 is 40200202004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325571 + ... + 952050.

It is an arithmetic number, because the mean of its divisors is an integer number (14488233480).

Almost surely, 2^400202002040 is an apocalyptic number.

400202002040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400202002040 is an abundant number, since it is smaller than the sum of its proper divisors (527044940680).

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

400202002040 is a wasteful number, since it uses less digits than its factorization.

400202002040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277864 (or 1277860 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 400202002040 its reverse (40200202004), we get a palindrome (440402204044).

The spelling of 400202002040 in words is "four hundred billion, two hundred two million, two thousand, forty".