1539731396 has 24 divisors (see below), whose sum is σ = 3091186560. Its totient is φ = 657372672.

The previous prime is 1539731377. The next prime is 1539731399. The reversal of 1539731396 is 6931379351.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1539731396.

It is not an unprimeable number, because it can be changed into a prime (1539731399) 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, 97181 + ... + 111908.

It is an arithmetic number, because the mean of its divisors is an integer number (128799440).

Almost surely, 2^1539731396 is an apocalyptic number.

It is an amenable number.

1539731396 is an abundant number, since it is smaller than the sum of its proper divisors (1551455164).

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

1539731396 is a wasteful number, since it uses less digits than its factorization.

1539731396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209363 (or 209361 counting only the distinct ones).

The product of its digits is 459270, while the sum is 47.

The square root of 1539731396 is about 39239.4112595997. The cubic root of 1539731396 is about 1154.7332069952.

The spelling of 1539731396 in words is "one billion, five hundred thirty-nine million, seven hundred thirty-one thousand, three hundred ninety-six".