1391823087930 has 192 divisors, whose sum is σ = 4034359001088. Its totient is φ = 330015761280.

The previous prime is 1391823087929. The next prime is 1391823087947. The reversal of 1391823087930 is 397803281931.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 77370397 + ... + 77388383.

It is an arithmetic number, because the mean of its divisors is an integer number (21012286464).

Almost surely, 2^{1391823087930} is an apocalyptic number.

1391823087930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391823087930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2017179500544).

1391823087930 is an abundant number, since it is smaller than the sum of its proper divisors (2642535913158).

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

1391823087930 is a wasteful number, since it uses less digits than its factorization.

1391823087930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19721 (or 19718 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 1391823087930 in words is "one trillion, three hundred ninety-one billion, eight hundred twenty-three million, eighty-seven thousand, nine hundred thirty".