1380640347684 has 120 divisors (see below), whose sum is σ = 3887429958720. Its totient is φ = 424754767296.

The previous prime is 1380640347677. The next prime is 1380640347701. The reversal of 1380640347684 is 4867430460831.

1380640347684 is a `hidden beast` number, since 1 + 38 + 0 + 64 + 0 + 3 + 476 + 84 = 666.

It is a super-3 number, since 3×1380640347684³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1380640347684.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 39250897 + ... + 39286055.

It is an arithmetic number, because the mean of its divisors is an integer number (32395249656).

Almost surely, 2^{1380640347684} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1380640347684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1943714979360).

1380640347684 is an abundant number, since it is smaller than the sum of its proper divisors (2506789611036).

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

1380640347684 is a wasteful number, since it uses less digits than its factorization.

1380640347684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44511 (or 44500 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 1380640347684 in words is "one trillion, three hundred eighty billion, six hundred forty million, three hundred forty-seven thousand, six hundred eighty-four".