401538 has 8 divisors (see below), whose sum is σ = 803088. Its totient is φ = 133844.

The previous prime is 401537. The next prime is 401539. The reversal of 401538 is 835104.

401538 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (401537) and next prime (401539).

It is a sphenic number, since it is the product of 3 distinct primes.

401538 is an admirable number.

It is a super-2 number, since 2×401538² = 322465530888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33456 + ... + 33467.

It is an arithmetic number, because the mean of its divisors is an integer number (100386).

2⁴⁰¹⁵³⁸ is an apocalyptic number.

401538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

401538 is a wasteful number, since it uses less digits than its factorization.

401538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66928.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 401538 is about 633.6702612558. The cubic root of 401538 is about 73.7749432052.

It can be divided in two parts, 401 and 538, that added together give a palindrome (939).

The spelling of 401538 in words is "four hundred one thousand, five hundred thirty-eight".