400535341320 has 64 divisors (see below), whose sum is σ = 1201653584640. Its totient is φ = 106805196800.

The previous prime is 400535341309. The next prime is 400535341321. The reversal of 400535341320 is 23143535004.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (400535341321) 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, 4034680 + ... + 4132760.

It is an arithmetic number, because the mean of its divisors is an integer number (18775837260).

Almost surely, 2^400535341320 is an apocalyptic number.

400535341320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400535341320 is an abundant number, since it is smaller than the sum of its proper divisors (801118243320).

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

400535341320 is a wasteful number, since it uses less digits than its factorization.

400535341320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132126 (or 132122 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 400535341320 its reverse (23143535004), we get a palindrome (423678876324).

The spelling of 400535341320 in words is "four hundred billion, five hundred thirty-five million, three hundred forty-one thousand, three hundred twenty".