401988 has 24 divisors (see below), whose sum is σ = 948640. Its totient is φ = 132480.

The previous prime is 401987. The next prime is 401993. The reversal of 401988 is 889104.

It is a happy number.

401988 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (401981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1548 + ... + 1788.

2⁴⁰¹⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

401988 is an abundant number, since it is smaller than the sum of its proper divisors (546652).

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

401988 is a wasteful number, since it uses less digits than its factorization.

401988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 401988 is about 634.0252360908. The cubic root of 401988 is about 73.8024925532.

The spelling of 401988 in words is "four hundred one thousand, nine hundred eighty-eight".