1238683240 has 64 divisors (see below), whose sum is σ = 2958282000. Its totient is φ = 465174528.

The previous prime is 1238683219. The next prime is 1238683247. The reversal of 1238683240 is 423868321.

It can be written as a sum of positive squares in 8 ways, for example, as 789497604 + 449185636 = 28098^2 + 21194^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1238683240.

It is not an unprimeable number, because it can be changed into a prime (1238683247) 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, 303292 + ... + 307348.

Almost surely, 2^1238683240 is an apocalyptic number.

1238683240 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 1238683240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1479141000).

1238683240 is an abundant number, since it is smaller than the sum of its proper divisors (1719598760).

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

1238683240 is a wasteful number, since it uses less digits than its factorization.

1238683240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534 (or 4530 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 1238683240 is about 35194.9320215283. The cubic root of 1238683240 is about 1073.9566556353.

The spelling of 1238683240 in words is "one billion, two hundred thirty-eight million, six hundred eighty-three thousand, two hundred forty".