401400020 has 48 divisors (see below), whose sum is σ = 996589440. Its totient is φ = 132875904.

The previous prime is 401400019. The next prime is 401400029. The reversal of 401400020 is 20004104.

It is a super-2 number, since 2×401400020² = 322243952112000800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401399974 and 401400010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401400029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45374 + ... + 53493.

It is an arithmetic number, because the mean of its divisors is an integer number (20762280).

Almost surely, 2^401400020 is an apocalyptic number.

It is an amenable number.

401400020 is an abundant number, since it is smaller than the sum of its proper divisors (595189420).

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

401400020 is a wasteful number, since it uses less digits than its factorization.

401400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98912 (or 98910 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 401400020 is about 20034.9699276041. The cubic root of 401400020 is about 737.6649183996.

Adding to 401400020 its reverse (20004104), we get a palindrome (421404124).

The spelling of 401400020 in words is "four hundred one million, four hundred thousand, twenty".