400432310432 has 144 divisors (see below), whose sum is σ = 1000954075968. Its totient is φ = 155930987520.

The previous prime is 400432310429. The next prime is 400432310461. The reversal of 400432310432 is 234013234004.

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, 40993613 + ... + 41003379.

It is an arithmetic number, because the mean of its divisors is an integer number (6951069972).

Almost surely, 2^400432310432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400432310432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500477037984).

400432310432 is an abundant number, since it is smaller than the sum of its proper divisors (600521765536).

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

400432310432 is a wasteful number, since it uses less digits than its factorization.

400432310432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12179 (or 12164 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 400432310432 its reverse (234013234004), we get a palindrome (634445544436).

The spelling of 400432310432 in words is "four hundred billion, four hundred thirty-two million, three hundred ten thousand, four hundred thirty-two".