1391094992 has 80 divisors (see below), whose sum is σ = 3202176000. Its totient is φ = 572866560.

The previous prime is 1391094967. The next prime is 1391095001. The reversal of 1391094992 is 2994901931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515984 + ... + 518672.

It is an arithmetic number, because the mean of its divisors is an integer number (40027200).

Almost surely, 2^1391094992 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 1391094992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1601088000).

1391094992 is an abundant number, since it is smaller than the sum of its proper divisors (1811081008).

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

1391094992 is a wasteful number, since it uses less digits than its factorization.

1391094992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884 (or 2878 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 1391094992 is about 37297.3858601377. The cubic root of 1391094992 is about 1116.3120062181.

The spelling of 1391094992 in words is "one billion, three hundred ninety-one million, ninety-four thousand, nine hundred ninety-two".