400197 has 32 divisors (see below), whose sum is σ = 691200. Its totient is φ = 200448.

The previous prime is 400187. The next prime is 400199. The reversal of 400197 is 791004.

It is not a de Polignac number, because 400197 - 2⁷ = 400069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6754 + ... + 6812.

It is an arithmetic number, because the mean of its divisors is an integer number (21600).

2⁴⁰⁰¹⁹⁷ is an apocalyptic number.

It is an amenable number.

400197 is a deficient number, since it is larger than the sum of its proper divisors (291003).

400197 is a wasteful number, since it uses less digits than its factorization.

400197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 400197 is about 632.6112550374. The cubic root of 400197 is about 73.6927238910.

The spelling of 400197 in words is "four hundred thousand, one hundred ninety-seven".