1396478859840 has 336 divisors, whose sum is σ = 5078235614400. Its totient is φ = 351250919424.

The previous prime is 1396478859799. The next prime is 1396478859857. The reversal of 1396478859840 is 489588746931.

1396478859840 is a `hidden beast` number, since 1 + 39 + 6 + 478 + 85 + 9 + 8 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12475159 + ... + 12586601.

Almost surely, 2^{1396478859840} is an apocalyptic number.

1396478859840 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 1396478859840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2539117807200).

1396478859840 is an abundant number, since it is smaller than the sum of its proper divisors (3681756754560).

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

1396478859840 is a wasteful number, since it uses less digits than its factorization.

1396478859840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111714 (or 111701 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 72.

The spelling of 1396478859840 in words is "one trillion, three hundred ninety-six billion, four hundred seventy-eight million, eight hundred fifty-nine thousand, eight hundred forty".