401624 has 16 divisors (see below), whose sum is σ = 766320. Its totient is φ = 197280.

The previous prime is 401593. The next prime is 401627. The reversal of 401624 is 426104.

It is a super-2 number, since 2×401624² = 322603674752, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401627) by changing a digit.

401624 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77 + ... + 899.

It is an arithmetic number, because the mean of its divisors is an integer number (47895).

2⁴⁰¹⁶²⁴ is an apocalyptic number.

It is an amenable number.

401624 is a deficient number, since it is larger than the sum of its proper divisors (364696).

401624 is a wasteful number, since it uses less digits than its factorization.

401624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 401624 is about 633.7381162594. The cubic root of 401624 is about 73.7802097820.

Adding to 401624 its reverse (426104), we get a palindrome (827728).

The spelling of 401624 in words is "four hundred one thousand, six hundred twenty-four".