401890 has 8 divisors (see below), whose sum is σ = 723420. Its totient is φ = 160752.

The previous prime is 401887. The next prime is 401903. The reversal of 401890 is 98104.

It can be written as a sum of positive squares in 2 ways, for example, as 339889 + 62001 = 583^2 + 249^2 .

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

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20085 + ... + 20104.

2⁴⁰¹⁸⁹⁰ is an apocalyptic number.

401890 is a deficient number, since it is larger than the sum of its proper divisors (321530).

401890 is a wasteful number, since it uses less digits than its factorization.

401890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40196.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 401890 is about 633.9479473900. The cubic root of 401890 is about 73.7964946693.

Adding to 401890 its reverse (98104), we get a palindrome (499994).

The spelling of 401890 in words is "four hundred one thousand, eight hundred ninety".