1001389158 has 96 divisors (see below), whose sum is σ = 2726830080. Its totient is φ = 258007680.

The previous prime is 1001389153. The next prime is 1001389159. The reversal of 1001389158 is 8519831001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001389153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 173178 + ... + 178866.

It is an arithmetic number, because the mean of its divisors is an integer number (28404480).

Almost surely, 2^1001389158 is an apocalyptic number.

1001389158 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 1001389158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363415040).

1001389158 is an abundant number, since it is smaller than the sum of its proper divisors (1725440922).

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

1001389158 is a wasteful number, since it uses less digits than its factorization.

1001389158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5842 (or 5839 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 1001389158 is about 31644.7334954807. The cubic root of 1001389158 is about 1000.4628384142.

The spelling of 1001389158 in words is "one billion, one million, three hundred eighty-nine thousand, one hundred fifty-eight".