400190 has 16 divisors (see below), whose sum is σ = 823392. Its totient is φ = 137184.

The previous prime is 400187. The next prime is 400199. The reversal of 400190 is 91004.

It is a super-2 number, since 2×400190² = 320304072200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2789 + ... + 2928.

It is an arithmetic number, because the mean of its divisors is an integer number (51462).

2⁴⁰⁰¹⁹⁰ is an apocalyptic number.

400190 is an abundant number, since it is smaller than the sum of its proper divisors (423202).

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

400190 is a wasteful number, since it uses less digits than its factorization.

400190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5731.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 400190 is about 632.6057223895. The cubic root of 400190 is about 73.6922942259.

Adding to 400190 its reverse (91004), we get a palindrome (491194).

The spelling of 400190 in words is "four hundred thousand, one hundred ninety".