1239066740 has 48 divisors (see below), whose sum is σ = 2683425024. Its totient is φ = 480288000.

The previous prime is 1239066721. The next prime is 1239066749. The reversal of 1239066740 is 476609321.

It is a junction number, because it is equal to n+sod(n) for n = 1239066694 and 1239066703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239066749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118817 + ... + 128823.

It is an arithmetic number, because the mean of its divisors is an integer number (55904688).

Almost surely, 2^1239066740 is an apocalyptic number.

1239066740 is a gapful number since it is divisible by the number (10) 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 1239066740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341712512).

1239066740 is an abundant number, since it is smaller than the sum of its proper divisors (1444358284).

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

1239066740 is a wasteful number, since it uses less digits than its factorization.

1239066740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10208 (or 10206 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 1239066740 is about 35200.3798274962. The cubic root of 1239066740 is about 1074.0674775864.

The spelling of 1239066740 in words is "one billion, two hundred thirty-nine million, sixty-six thousand, seven hundred forty".