401810040 has 96 divisors (see below), whose sum is σ = 1315576080. Its totient is φ = 106354176.

The previous prime is 401810029. The next prime is 401810063. The reversal of 401810040 is 40018104.

It is a super-2 number, since 2×401810040² = 322902616489603200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 401809995 and 401810022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45247 + ... + 53393.

Almost surely, 2^401810040 is an apocalyptic number.

401810040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401810040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657788040).

401810040 is an abundant number, since it is smaller than the sum of its proper divisors (913766040).

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

401810040 is a wasteful number, since it uses less digits than its factorization.

401810040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8301 (or 8294 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 401810040 is about 20045.1999241714. The cubic root of 401810040 is about 737.9160016324.

Adding to 401810040 its reverse (40018104), we get a palindrome (441828144).

The spelling of 401810040 in words is "four hundred one million, eight hundred ten thousand, forty".