401442164 has 12 divisors (see below), whose sum is σ = 707887488. Its totient is φ = 199188600.

The previous prime is 401442137. The next prime is 401442187. The reversal of 401442164 is 461244104.

It is a super-2 number, since 2×401442164² = 322311622074005792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382532 + ... + 383579.

It is an arithmetic number, because the mean of its divisors is an integer number (58990624).

Almost surely, 2^401442164 is an apocalyptic number.

It is an amenable number.

401442164 is a deficient number, since it is larger than the sum of its proper divisors (306445324).

401442164 is a wasteful number, since it uses less digits than its factorization.

401442164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766246 (or 766244 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 401442164 is about 20036.0216609985. The cubic root of 401442164 is about 737.6907339292.

Adding to 401442164 its reverse (461244104), we get a palindrome (862686268).

The spelling of 401442164 in words is "four hundred one million, four hundred forty-two thousand, one hundred sixty-four".