1391117058 has 64 divisors (see below), whose sum is σ = 3165143040. Its totient is φ = 452768400.

The previous prime is 1391117051. The next prime is 1391117059. The reversal of 1391117058 is 8507111931.

It is not an unprimeable number, because it can be changed into a prime (1391117051) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 408543 + ... + 411933.

It is an arithmetic number, because the mean of its divisors is an integer number (49455360).

Almost surely, 2^1391117058 is an apocalyptic number.

1391117058 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391117058, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1582571520).

1391117058 is an abundant number, since it is smaller than the sum of its proper divisors (1774025982).

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

1391117058 is a wasteful number, since it uses less digits than its factorization.

1391117058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580 (or 3574 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 36.

The square root of 1391117058 is about 37297.6816705811. The cubic root of 1391117058 is about 1116.3179086212.

Adding to 1391117058 its reverse (8507111931), we get a palindrome (9898228989).

The spelling of 1391117058 in words is "one billion, three hundred ninety-one million, one hundred seventeen thousand, fifty-eight".