395261089638 has 16 divisors (see below), whose sum is σ = 790581736560. Its totient is φ = 131743770336.

The previous prime is 395261089633. The next prime is 395261089673. The reversal of 395261089638 is 836980162593.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395261089633) 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, 2395045 + ... + 2554752.

It is an arithmetic number, because the mean of its divisors is an integer number (49411358535).

Almost surely, 2^395261089638 is an apocalyptic number.

395261089638 is an abundant number, since it is smaller than the sum of its proper divisors (395320646922).

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

395261089638 is a wasteful number, since it uses less digits than its factorization.

395261089638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4963111.

The product of its (nonzero) digits is 16796160, while the sum is 60.

The spelling of 395261089638 in words is "three hundred ninety-five billion, two hundred sixty-one million, eighty-nine thousand, six hundred thirty-eight".