1238620340 has 24 divisors (see below), whose sum is σ = 2754109512. Its totient is φ = 466304000.

The previous prime is 1238620333. The next prime is 1238620349. The reversal of 1238620340 is 430268321.

It can be written as a sum of positive squares in 4 ways, for example, as 29528356 + 1209091984 = 5434^2 + 34772^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238620349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1821161 + ... + 1821840.

It is an arithmetic number, because the mean of its divisors is an integer number (114754563).

Almost surely, 2^1238620340 is an apocalyptic number.

1238620340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1238620340 is an abundant number, since it is smaller than the sum of its proper divisors (1515489172).

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

1238620340 is a wasteful number, since it uses less digits than its factorization.

1238620340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643027 (or 3643025 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1238620340 is about 35194.0384156181. The cubic root of 1238620340 is about 1073.9384769181.

Adding to 1238620340 its reverse (430268321), we get a palindrome (1668888661).

The spelling of 1238620340 in words is "one billion, two hundred thirty-eight million, six hundred twenty thousand, three hundred forty".