1388950337820 has 48 divisors (see below), whose sum is σ = 3893330101248. Its totient is φ = 369980170560.

The previous prime is 1388950337711. The next prime is 1388950337837. The reversal of 1388950337820 is 287330598831.

It is a happy number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 12650704 + ... + 12760023.

It is an arithmetic number, because the mean of its divisors is an integer number (81111043776).

Almost surely, 2^{1388950337820} is an apocalyptic number.

1388950337820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388950337820 is an abundant number, since it is smaller than the sum of its proper divisors (2504379763428).

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

1388950337820 is a wasteful number, since it uses less digits than its factorization.

1388950337820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25411650 (or 25411648 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 1388950337820 in words is "one trillion, three hundred eighty-eight billion, nine hundred fifty million, three hundred thirty-seven thousand, eight hundred twenty".