401140194 has 128 divisors (see below), whose sum is σ = 1091543040. Its totient is φ = 95192064.

The previous prime is 401140153. The next prime is 401140219. The reversal of 401140194 is 491041104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 212547 + ... + 214425.

It is an arithmetic number, because the mean of its divisors is an integer number (8527680).

Almost surely, 2^401140194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401140194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545771520).

401140194 is an abundant number, since it is smaller than the sum of its proper divisors (690402846).

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

401140194 is a wasteful number, since it uses less digits than its factorization.

401140194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 401140194 is about 20028.4845657379. The cubic root of 401140194 is about 737.5057206872.

Adding to 401140194 its reverse (491041104), we get a palindrome (892181298).

The spelling of 401140194 in words is "four hundred one million, one hundred forty thousand, one hundred ninety-four".