1081857900 has 216 divisors, whose sum is σ = 3473308944. Its totient is φ = 259072000.

The previous prime is 1081857899. The next prime is 1081857913. The reversal of 1081857900 is 97581801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2697700 + ... + 2698100.

It is an arithmetic number, because the mean of its divisors is an integer number (16080134).

Almost surely, 2^1081857900 is an apocalyptic number.

1081857900 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 1081857900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1736654472).

1081857900 is an abundant number, since it is smaller than the sum of its proper divisors (2391451044).

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

1081857900 is a wasteful number, since it uses less digits than its factorization.

1081857900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 1081857900 is about 32891.6083522834. The cubic root of 1081857900 is about 1026.5735576906.

The spelling of 1081857900 in words is "one billion, eighty-one million, eight hundred fifty-seven thousand, nine hundred".