1071591828 has 12 divisors (see below), whose sum is σ = 2500380960. Its totient is φ = 357197272.

The previous prime is 1071591823. The next prime is 1071591877. The reversal of 1071591828 is 8281951701.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1071591828² = 2296618091672763168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1071591828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071591823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44649648 + ... + 44649671.

It is an arithmetic number, because the mean of its divisors is an integer number (208365080).

Almost surely, 2^1071591828 is an apocalyptic number.

It is an amenable number.

1071591828 is an abundant number, since it is smaller than the sum of its proper divisors (1428789132).

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

1071591828 is a wasteful number, since it uses less digits than its factorization.

1071591828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89299326 (or 89299324 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 42.

The square root of 1071591828 is about 32735.1772257307. The cubic root of 1071591828 is about 1023.3160779934.

The spelling of 1071591828 in words is "one billion, seventy-one million, five hundred ninety-one thousand, eight hundred twenty-eight".