400420202134520 has 16 divisors (see below), whose sum is σ = 900945454802760. Its totient is φ = 160168080853792.

The previous prime is 400420202134483. The next prime is 400420202134523. The reversal of 400420202134520 is 25431202024004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400420202134523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5005252526642 + ... + 5005252526721.

Almost surely, 2^{400420202134520} is an apocalyptic number.

400420202134520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400420202134520 is an abundant number, since it is smaller than the sum of its proper divisors (500525252668240).

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

400420202134520 is a wasteful number, since it uses less digits than its factorization.

400420202134520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010505053374 (or 10010505053370 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 400420202134520 its reverse (25431202024004), we get a palindrome (425851404158524).

The spelling of 400420202134520 in words is "four hundred trillion, four hundred twenty billion, two hundred two million, one hundred thirty-four thousand, five hundred twenty".