1385391221800 has 48 divisors (see below), whose sum is σ = 3299596429500. Its totient is φ = 540640473600.

The previous prime is 1385391221779. The next prime is 1385391221833. The reversal of 1385391221800 is 81221935831.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 13920696196 + 1371470525604 = 117986^2 + 1171098^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84466875 + ... + 84483274.

Almost surely, 2^{1385391221800} is an apocalyptic number.

1385391221800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385391221800 is an abundant number, since it is smaller than the sum of its proper divisors (1914205207700).

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

1385391221800 is a wasteful number, since it uses less digits than its factorization.

1385391221800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168950206 (or 168950197 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 1385391221800 in words is "one trillion, three hundred eighty-five billion, three hundred ninety-one million, two hundred twenty-one thousand, eight hundred".