1239530472 has 64 divisors (see below), whose sum is σ = 3459585600. Its totient is φ = 411203520.

The previous prime is 1239530459. The next prime is 1239530473. The reversal of 1239530472 is 2740359321.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1239530473) 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, 31978 + ... + 59174.

It is an arithmetic number, because the mean of its divisors is an integer number (54056025).

Almost surely, 2^1239530472 is an apocalyptic number.

1239530472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1239530472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1729792800).

1239530472 is an abundant number, since it is smaller than the sum of its proper divisors (2220055128).

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

1239530472 is a wasteful number, since it uses less digits than its factorization.

1239530472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27423 (or 27413 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 1239530472 is about 35206.9662424924. The cubic root of 1239530472 is about 1074.2014540488.

Adding to 1239530472 its reverse (2740359321), we get a palindrome (3979889793).

The spelling of 1239530472 in words is "one billion, two hundred thirty-nine million, five hundred thirty thousand, four hundred seventy-two".