1238507557380 has 72 divisors (see below), whose sum is σ = 3818393279064. Its totient is φ = 324854438400.

The previous prime is 1238507557369. The next prime is 1238507557381. The reversal of 1238507557380 is 837557058321.

1238507557380 is a `hidden beast` number, since 1 + 2 + 3 + 8 + 5 + 0 + 7 + 557 + 3 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1714456836 + 1236793100544 = 41406^2 + 1112112^2 .

It is not an unprimeable number, because it can be changed into a prime (1238507557381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56387361 + ... + 56409320.

It is an arithmetic number, because the mean of its divisors is an integer number (53033239987).

Almost surely, 2^{1238507557380} is an apocalyptic number.

1238507557380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1238507557380 is an abundant number, since it is smaller than the sum of its proper divisors (2579885721684).

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

1238507557380 is a wasteful number, since it uses less digits than its factorization.

1238507557380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112796757 (or 112796752 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 54.

The spelling of 1238507557380 in words is "one trillion, two hundred thirty-eight billion, five hundred seven million, five hundred fifty-seven thousand, three hundred eighty".