400021422140032 has 64 divisors (see below), whose sum is σ = 993559701119040. Its totient is φ = 155852502128640.

The previous prime is 400021422140029. The next prime is 400021422140051. The reversal of 400021422140032 is 230041224120004.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×400021422140032² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400021422139979 and 400021422140006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20293284693 + ... + 20293304404.

It is an arithmetic number, because the mean of its divisors is an integer number (15524370329985).

Almost surely, 2^{400021422140032} is an apocalyptic number.

It is an amenable number.

400021422140032 is an abundant number, since it is smaller than the sum of its proper divisors (593538278979008).

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

400021422140032 is a wasteful number, since it uses less digits than its factorization.

400021422140032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40586589129 (or 40586589117 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 400021422140032 its reverse (230041224120004), we get a palindrome (630062646260036).

The spelling of 400021422140032 in words is "four hundred trillion, twenty-one billion, four hundred twenty-two million, one hundred forty thousand, thirty-two".