1000133856 has 72 divisors (see below), whose sum is σ = 2993838120. Its totient is φ = 315830016.

The previous prime is 1000133833. The next prime is 1000133891. The reversal of 1000133856 is 6583310001.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85915 + ... + 96858.

It is an arithmetic number, because the mean of its divisors is an integer number (41581085).

Almost surely, 2^1000133856 is an apocalyptic number.

1000133856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1000133856 is an abundant number, since it is smaller than the sum of its proper divisors (1993704264).

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

1000133856 is a wasteful number, since it uses less digits than its factorization.

1000133856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182808 (or 182797 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1000133856 is about 31624.8929800561. The cubic root of 1000133856 is about 1000.0446166760.

Adding to 1000133856 its reverse (6583310001), we get a palindrome (7583443857).

The spelling of 1000133856 in words is "one billion, one hundred thirty-three thousand, eight hundred fifty-six".