395442439890 has 32 divisors (see below), whose sum is σ = 949109386176. Its totient is φ = 105446036160.

The previous prime is 395442439871. The next prime is 395442439897. The reversal of 395442439890 is 98934244593.

It is not an unprimeable number, because it can be changed into a prime (395442439897) 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, 298564 + ... + 938096.

It is an arithmetic number, because the mean of its divisors is an integer number (29659668318).

Almost surely, 2^395442439890 is an apocalyptic number.

395442439890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

395442439890 is an abundant number, since it is smaller than the sum of its proper divisors (553666946286).

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

395442439890 is a wasteful number, since it uses less digits than its factorization.

395442439890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660154.

The product of its (nonzero) digits is 33592320, while the sum is 60.

The spelling of 395442439890 in words is "three hundred ninety-five billion, four hundred forty-two million, four hundred thirty-nine thousand, eight hundred ninety".