1005838158 has 64 divisors (see below), whose sum is σ = 2227579200. Its totient is φ = 300810240.

The previous prime is 1005838129. The next prime is 1005838159. The reversal of 1005838158 is 8518385001.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005838159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1307598 + ... + 1308366.

It is an arithmetic number, because the mean of its divisors is an integer number (34805925).

Almost surely, 2^1005838158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1005838158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1113789600).

1005838158 is an abundant number, since it is smaller than the sum of its proper divisors (1221741042).

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

1005838158 is a wasteful number, since it uses less digits than its factorization.

1005838158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237.

The product of its (nonzero) digits is 38400, while the sum is 39.

The square root of 1005838158 is about 31714.9516474486. The cubic root of 1005838158 is about 1001.9422777813.

The spelling of 1005838158 in words is "one billion, five million, eight hundred thirty-eight thousand, one hundred fifty-eight".