401421012440 has 48 divisors (see below), whose sum is σ = 1050658063200. Its totient is φ = 137630060736.

The previous prime is 401421012439. The next prime is 401421012463. The reversal of 401421012440 is 44210124104.

It is a super-2 number, since 2×401421012440² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102401360 + ... + 102405279.

It is an arithmetic number, because the mean of its divisors is an integer number (21888709650).

Almost surely, 2^401421012440 is an apocalyptic number.

401421012440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401421012440 is an abundant number, since it is smaller than the sum of its proper divisors (649237050760).

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

401421012440 is a wasteful number, since it uses less digits than its factorization.

401421012440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204806664 (or 204806653 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 401421012440 its reverse (44210124104), we get a palindrome (445631136544).

The spelling of 401421012440 in words is "four hundred one billion, four hundred twenty-one million, twelve thousand, four hundred forty".