401402020 has 12 divisors (see below), whose sum is σ = 842944284. Its totient is φ = 160560800.

The previous prime is 401401997. The next prime is 401402059. The reversal of 401402020 is 20204104.

It can be written as a sum of positive squares in 2 ways, for example, as 214095424 + 187306596 = 14632^2 + 13686^2 .

It is a super-2 number, since 2×401402020² = 322247163320160800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10035031 + ... + 10035070.

It is an arithmetic number, because the mean of its divisors is an integer number (70245357).

Almost surely, 2^401402020 is an apocalyptic number.

It is an amenable number.

401402020 is an abundant number, since it is smaller than the sum of its proper divisors (441542264).

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

401402020 is a wasteful number, since it uses less digits than its factorization.

401402020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20070110 (or 20070108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 401402020 is about 20035.0198402697. The cubic root of 401402020 is about 737.6661435509. Note that the first 3 decimals are identical.

Adding to 401402020 its reverse (20204104), we get a palindrome (421606124).

The spelling of 401402020 in words is "four hundred one million, four hundred two thousand, twenty".