401543504240 has 40 divisors (see below), whose sum is σ = 942153701280. Its totient is φ = 159143844096.

The previous prime is 401543504237. The next prime is 401543504347. The reversal of 401543504240 is 42405345104.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×401543504240² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401543504197 and 401543504206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23015564 + ... + 23033003.

It is an arithmetic number, because the mean of its divisors is an integer number (23553842532).

Almost surely, 2^401543504240 is an apocalyptic number.

401543504240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401543504240 is an abundant number, since it is smaller than the sum of its proper divisors (540610197040).

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

401543504240 is a wasteful number, since it uses less digits than its factorization.

401543504240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46048689 (or 46048683 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 401543504240 its reverse (42405345104), we get a palindrome (443948849344).

The spelling of 401543504240 in words is "four hundred one billion, five hundred forty-three million, five hundred four thousand, two hundred forty".