1081445400 has 144 divisors (see below), whose sum is σ = 4150738800. Its totient is φ = 247184640.

The previous prime is 1081445389. The next prime is 1081445411. The reversal of 1081445400 is 45441801.

It is a happy number.

1081445400 is a `hidden beast` number, since 1 + 0 + 81 + 44 + 540 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1081445389) and next prime (1081445411).

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 30315 + ... + 55514.

It is an arithmetic number, because the mean of its divisors is an integer number (28824575).

Almost surely, 2^1081445400 is an apocalyptic number.

1081445400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081445400 is an abundant number, since it is smaller than the sum of its proper divisors (3069293400).

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

1081445400 is a wasteful number, since it uses less digits than its factorization.

1081445400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85858 (or 85846 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 1081445400 is about 32885.3371580709. The cubic root of 1081445400 is about 1026.4430675328.

The spelling of 1081445400 in words is "one billion, eighty-one million, four hundred forty-five thousand, four hundred".