400732996992 has 128 divisors (see below), whose sum is σ = 1120966454400. Its totient is φ = 126491258880.

The previous prime is 400732996991. The next prime is 400732996999. The reversal of 400732996992 is 299699237004.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400732996991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18382323 + ... + 18404109.

It is an arithmetic number, because the mean of its divisors is an integer number (8757550425).

Almost surely, 2^400732996992 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 400732996992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560483227200).

400732996992 is an abundant number, since it is smaller than the sum of its proper divisors (720233457408).

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

400732996992 is a wasteful number, since it uses less digits than its factorization.

400732996992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24344 (or 24332 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 60.

The spelling of 400732996992 in words is "four hundred billion, seven hundred thirty-two million, nine hundred ninety-six thousand, nine hundred ninety-two".