1395439612 has 48 divisors (see below), whose sum is σ = 2861413632. Its totient is φ = 582986880.

The previous prime is 1395439607. The next prime is 1395439613. The reversal of 1395439612 is 2169345931.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1395439613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 915483 + ... + 917005.

It is an arithmetic number, because the mean of its divisors is an integer number (59612784).

Almost surely, 2^1395439612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1395439612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1430706816).

1395439612 is an abundant number, since it is smaller than the sum of its proper divisors (1465974020).

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

1395439612 is a wasteful number, since it uses less digits than its factorization.

1395439612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338 (or 2336 counting only the distinct ones).

The product of its digits is 174960, while the sum is 43.

The square root of 1395439612 is about 37355.5834113188. The cubic root of 1395439612 is about 1117.4729408706.

The spelling of 1395439612 in words is "one billion, three hundred ninety-five million, four hundred thirty-nine thousand, six hundred twelve".