401870 has 16 divisors (see below), whose sum is σ = 826848. Its totient is φ = 137760.

The previous prime is 401867. The next prime is 401887. The reversal of 401870 is 78104.

401870 = 365² + 366² + 367².

It is a happy number.

It is a super-2 number, since 2×401870² = 322998993800, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2801 + ... + 2940.

It is an arithmetic number, because the mean of its divisors is an integer number (51678).

2⁴⁰¹⁸⁷⁰ is an apocalyptic number.

401870 is an abundant number, since it is smaller than the sum of its proper divisors (424978).

It is a weird number, because it is abundant, but not a pseudoperfect number.

401870 is a wasteful number, since it uses less digits than its factorization.

401870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5755.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 401870 is about 633.9321730280. The cubic root of 401870 is about 73.7952704915.

Adding to 401870 its reverse (78104), we get a palindrome (479974).

The spelling of 401870 in words is "four hundred one thousand, eight hundred seventy".