400003340243220 has 72 divisors (see below), whose sum is σ = 1386678246180864. Its totient is φ = 91429334912448.

The previous prime is 400003340243189. The next prime is 400003340243267. The reversal of 400003340243220 is 22342043300004.

400003340243220 is a `hidden beast` number, since 4 + 0 + 0 + 0 + 0 + 33 + 402 + 4 + 3 + 220 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158731482964 + ... + 158731485483.

Almost surely, 2^{400003340243220} is an apocalyptic number.

It is an amenable number.

400003340243220 is an abundant number, since it is smaller than the sum of its proper divisors (986674905937644).

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

400003340243220 is a wasteful number, since it uses less digits than its factorization.

400003340243220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317462968469 (or 317462968464 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 400003340243220 its reverse (22342043300004), we get a palindrome (422345383543224).

The spelling of 400003340243220 in words is "four hundred trillion, three billion, three hundred forty million, two hundred forty-three thousand, two hundred twenty".