1395860985 has 16 divisors (see below), whose sum is σ = 2481530880. Its totient is φ = 744459120.

The previous prime is 1395860981. The next prime is 1395861013. The reversal of 1395860985 is 5890685931.

It is a happy number.

It is not a de Polignac number, because 1395860985 - 2² = 1395860981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1395860981) 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, 5169721 + ... + 5169990.

It is an arithmetic number, because the mean of its divisors is an integer number (155095680).

Almost surely, 2^1395860985 is an apocalyptic number.

1395860985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1395860985 is a deficient number, since it is larger than the sum of its proper divisors (1085669895).

1395860985 is a wasteful number, since it uses less digits than its factorization.

1395860985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10339725 (or 10339719 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The square root of 1395860985 is about 37361.2230126370. The cubic root of 1395860985 is about 1117.5854085436.

The spelling of 1395860985 in words is "one billion, three hundred ninety-five million, eight hundred sixty thousand, nine hundred eighty-five".