1085215128 has 32 divisors (see below), whose sum is σ = 2872629360. Its totient is φ = 340459520.

The previous prime is 1085215099. The next prime is 1085215129. The reversal of 1085215128 is 8215125801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085215129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329513 + ... + 1330328.

Almost surely, 2^1085215128 is an apocalyptic number.

It is an amenable number.

1085215128 is an abundant number, since it is smaller than the sum of its proper divisors (1787414232).

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

1085215128 is a wasteful number, since it uses less digits than its factorization.

1085215128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659867 (or 2659863 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 33.

The square root of 1085215128 is about 32942.6035400968. The cubic root of 1085215128 is about 1027.6343509239.

The spelling of 1085215128 in words is "one billion, eighty-five million, two hundred fifteen thousand, one hundred twenty-eight".