1238288811820 has 12 divisors (see below), whose sum is σ = 2600406504864. Its totient is φ = 495315524720.

The previous prime is 1238288811791. The next prime is 1238288811833. The reversal of 1238288811820 is 281188828321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30957220276 + ... + 30957220315.

It is an arithmetic number, because the mean of its divisors is an integer number (216700542072).

Almost surely, 2^{1238288811820} is an apocalyptic number.

1238288811820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1238288811820 is an abundant number, since it is smaller than the sum of its proper divisors (1362117693044).

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

1238288811820 is a wasteful number, since it uses less digits than its factorization.

1238288811820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61914440600 (or 61914440598 counting only the distinct ones).

The product of its (nonzero) digits is 786432, while the sum is 52.

The spelling of 1238288811820 in words is "one trillion, two hundred thirty-eight billion, two hundred eighty-eight million, eight hundred eleven thousand, eight hundred twenty".