1388666459040 has 384 divisors, whose sum is σ = 5160466257408. Its totient is φ = 307257753600.

The previous prime is 1388666459017. The next prime is 1388666459053. The reversal of 1388666459040 is 409546668831.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24462690 + ... + 24519390.

It is an arithmetic number, because the mean of its divisors is an integer number (13438714212).

Almost surely, 2^{1388666459040} is an apocalyptic number.

1388666459040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388666459040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2580233128704).

1388666459040 is an abundant number, since it is smaller than the sum of its proper divisors (3771799798368).

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

1388666459040 is a wasteful number, since it uses less digits than its factorization.

1388666459040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56960 (or 56952 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 60.

The spelling of 1388666459040 in words is "one trillion, three hundred eighty-eight billion, six hundred sixty-six million, four hundred fifty-nine thousand, forty".