1238320340 has 12 divisors (see below), whose sum is σ = 2600472756. Its totient is φ = 495328128.

The previous prime is 1238320289. The next prime is 1238320351. The reversal of 1238320340 is 430238321.

It can be written as a sum of positive squares in 2 ways, for example, as 781985296 + 456335044 = 27964^2 + 21362^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30957989 + ... + 30958028.

It is an arithmetic number, because the mean of its divisors is an integer number (216706063).

Almost surely, 2^1238320340 is an apocalyptic number.

1238320340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1238320340 is an abundant number, since it is smaller than the sum of its proper divisors (1362152416).

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

1238320340 is a wasteful number, since it uses less digits than its factorization.

1238320340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61916026 (or 61916024 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1238320340 is about 35189.7760720355. The cubic root of 1238320340 is about 1073.8517655055.

Adding to 1238320340 its reverse (430238321), we get a palindrome (1668558661).

It can be divided in two parts, 12383 and 20340, that added together give a palindrome (32723).

The spelling of 1238320340 in words is "one billion, two hundred thirty-eight million, three hundred twenty thousand, three hundred forty".