1239130740 has 48 divisors (see below), whose sum is σ = 3563344512. Its totient is φ = 321503616.

The previous prime is 1239130709. The next prime is 1239130747. The reversal of 1239130740 is 470319321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1239130698 and 1239130707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239130747) 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, 276864 + ... + 281303.

It is an arithmetic number, because the mean of its divisors is an integer number (74236344).

Almost surely, 2^1239130740 is an apocalyptic number.

1239130740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1239130740 is an abundant number, since it is smaller than the sum of its proper divisors (2324213772).

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

1239130740 is a wasteful number, since it uses less digits than its factorization.

1239130740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558216 (or 558214 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1239130740 is about 35201.2888968572. The cubic root of 1239130740 is about 1074.0859697662.

The spelling of 1239130740 in words is "one billion, two hundred thirty-nine million, one hundred thirty thousand, seven hundred forty".