401140020 has 24 divisors (see below), whose sum is σ = 1123192224. Its totient is φ = 106970656.

The previous prime is 401140013. The next prime is 401140049. The reversal of 401140020 is 20041104.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 401139978 and 401140005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3342774 + ... + 3342893.

It is an arithmetic number, because the mean of its divisors is an integer number (46799676).

Almost surely, 2^401140020 is an apocalyptic number.

It is an amenable number.

401140020 is an abundant number, since it is smaller than the sum of its proper divisors (722052204).

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

401140020 is a wasteful number, since it uses less digits than its factorization.

401140020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6685679 (or 6685677 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 401140020 is about 20028.4802219240. The cubic root of 401140020 is about 737.5056140528.

Adding to 401140020 its reverse (20041104), we get a palindrome (421181124).

The spelling of 401140020 in words is "four hundred one million, one hundred forty thousand, twenty".