396140109 has 16 divisors (see below), whose sum is σ = 551964672. Its totient is φ = 252238448.

The previous prime is 396140081. The next prime is 396140141. The reversal of 396140109 is 901041693.

It is a cyclic number.

It is not a de Polignac number, because 396140109 - 2⁵ = 396140077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 396140109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396140149) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 47404 + ... + 55130.

It is an arithmetic number, because the mean of its divisors is an integer number (34497792).

Almost surely, 2^396140109 is an apocalyptic number.

It is an amenable number.

396140109 is a deficient number, since it is larger than the sum of its proper divisors (155824563).

396140109 is a wasteful number, since it uses less digits than its factorization.

396140109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8496.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 396140109 is about 19903.2688018828. The cubic root of 396140109 is about 734.4286419944.

The spelling of 396140109 in words is "three hundred ninety-six million, one hundred forty thousand, one hundred nine".