1380239424 has 84 divisors (see below), whose sum is σ = 3961508460. Its totient is φ = 459463680.

The previous prime is 1380239411. The next prime is 1380239431. The reversal of 1380239424 is 4249320831.

1380239424 is a `hidden beast` number, since 1 + 380 + 239 + 42 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1330790400 + 49449024 = 36480^2 + 7032^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 679242 + ... + 681270.

It is an arithmetic number, because the mean of its divisors is an integer number (47160815).

Almost surely, 2^1380239424 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 1380239424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1980754230).

1380239424 is an abundant number, since it is smaller than the sum of its proper divisors (2581269036).

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

1380239424 is a wasteful number, since it uses less digits than its factorization.

1380239424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3228 (or 3215 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1380239424 is about 37151.5736409644. The cubic root of 1380239424 is about 1113.4006641325.

The spelling of 1380239424 in words is "one billion, three hundred eighty million, two hundred thirty-nine thousand, four hundred twenty-four".