400532133280 has 24 divisors (see below), whose sum is σ = 946257165252. Its totient is φ = 160212853248.

The previous prime is 400532133187. The next prime is 400532133311. The reversal of 400532133280 is 82331235004.

It can be written as a sum of positive squares in 2 ways, for example, as 329352027664 + 71180105616 = 573892^2 + 266796^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1251662757 + ... + 1251663076.

Almost surely, 2^400532133280 is an apocalyptic number.

400532133280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400532133280 is an abundant number, since it is smaller than the sum of its proper divisors (545725031972).

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

400532133280 is a wasteful number, since it uses less digits than its factorization.

400532133280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503325848 (or 2503325840 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 400532133280 its reverse (82331235004), we get a palindrome (482863368284).

The spelling of 400532133280 in words is "four hundred billion, five hundred thirty-two million, one hundred thirty-three thousand, two hundred eighty".