400194 has 16 divisors (see below), whose sum is σ = 889440. Its totient is φ = 133380.

The previous prime is 400187. The next prime is 400199. The reversal of 400194 is 491004.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 7 ways as a sum of consecutive naturals, for example, 3652 + ... + 3759.

It is an arithmetic number, because the mean of its divisors is an integer number (55590).

2⁴⁰⁰¹⁹⁴ is an apocalyptic number.

400194 is an abundant number, since it is smaller than the sum of its proper divisors (489246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400194 is a wasteful number, since it uses less digits than its factorization.

400194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7422 (or 7416 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 400194 is about 632.6088839085. The cubic root of 400194 is about 73.6925397494.

Adding to 400194 its reverse (491004), we get a palindrome (891198).

It can be divided in two parts, 4001 and 94, that added together give a triangular number (4095 = T₉₀).

The spelling of 400194 in words is "four hundred thousand, one hundred ninety-four".