1085870520 has 192 divisors, whose sum is σ = 4245696000. Its totient is φ = 235125504.

The previous prime is 1085870507. The next prime is 1085870537. The reversal of 1085870520 is 250785801.

1085870520 is a `hidden beast` number, since 10 + 8 + 58 + 70 + 520 = 666.

It is a super-2 number, since 2×1085870520² = 2358229572410140800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36541 + ... + 59219.

It is an arithmetic number, because the mean of its divisors is an integer number (22113000).

Almost surely, 2^1085870520 is an apocalyptic number.

1085870520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1085870520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2122848000).

1085870520 is an abundant number, since it is smaller than the sum of its proper divisors (3159825480).

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

1085870520 is a wasteful number, since it uses less digits than its factorization.

1085870520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22722 (or 22715 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 1085870520 is about 32952.5495220021. The cubic root of 1085870520 is about 1027.8411817412.

The spelling of 1085870520 in words is "one billion, eighty-five million, eight hundred seventy thousand, five hundred twenty".