1388667424440 has 64 divisors (see below), whose sum is σ = 4166258463360. Its totient is φ = 370288540800.

The previous prime is 1388667424369. The next prime is 1388667424493. The reversal of 1388667424440 is 444247668831.

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, 1650627 + ... + 2345613.

It is an arithmetic number, because the mean of its divisors is an integer number (65097788490).

Almost surely, 2^{1388667424440} is an apocalyptic number.

1388667424440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388667424440 is an abundant number, since it is smaller than the sum of its proper divisors (2777591038920).

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

1388667424440 is a wasteful number, since it uses less digits than its factorization.

1388667424440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711652 (or 711648 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 57.

The spelling of 1388667424440 in words is "one trillion, three hundred eighty-eight billion, six hundred sixty-seven million, four hundred twenty-four thousand, four hundred forty".