401992 has 16 divisors (see below), whose sum is σ = 762300. Its totient is φ = 198720.

The previous prime is 401987. The next prime is 401993. The reversal of 401992 is 299104.

It can be written as a sum of positive squares in 2 ways, for example, as 401956 + 36 = 634^2 + 6^2 .

It is not an unprimeable number, because it can be changed into a prime (401993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642 + ... + 1102.

2⁴⁰¹⁹⁹² is an apocalyptic number.

It is an amenable number.

401992 is a deficient number, since it is larger than the sum of its proper divisors (360308).

401992 is a wasteful number, since it uses less digits than its factorization.

401992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 401992 is about 634.0283905315. The cubic root of 401992 is about 73.8027373441.

The spelling of 401992 in words is "four hundred one thousand, nine hundred ninety-two".