401002508840 has 32 divisors (see below), whose sum is σ = 902490526080. Its totient is φ = 160359246912.

The previous prime is 401002508839. The next prime is 401002508843. The reversal of 401002508840 is 48805200104.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 401002508797 and 401002508806.

It is not an unprimeable number, because it can be changed into a prime (401002508843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149092 + ... + 1456851.

It is an arithmetic number, because the mean of its divisors is an integer number (28202828940).

Almost surely, 2^401002508840 is an apocalyptic number.

401002508840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401002508840 is an abundant number, since it is smaller than the sum of its proper divisors (501488017240).

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

401002508840 is a wasteful number, since it uses less digits than its factorization.

401002508840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609801 (or 2609797 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

Adding to 401002508840 its reverse (48805200104), we get a palindrome (449807708944).

The spelling of 401002508840 in words is "four hundred one billion, two million, five hundred eight thousand, eight hundred forty".