1085321840 has 20 divisors (see below), whose sum is σ = 2523373464. Its totient is φ = 434128704.

The previous prime is 1085321827. The next prime is 1085321843. The reversal of 1085321840 is 481235801.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×1085321840³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1085321797 and 1085321806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085321843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6783182 + ... + 6783341.

Almost surely, 2^1085321840 is an apocalyptic number.

1085321840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1085321840 is an abundant number, since it is smaller than the sum of its proper divisors (1438051624).

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

1085321840 is a wasteful number, since it uses less digits than its factorization.

1085321840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13566536 (or 13566530 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1085321840 is about 32944.2231658298. The cubic root of 1085321840 is about 1027.6680331312.

The spelling of 1085321840 in words is "one billion, eighty-five million, three hundred twenty-one thousand, eight hundred forty".