1081325440 has 64 divisors (see below), whose sum is σ = 2783914560. Its totient is φ = 399255552.

The previous prime is 1081325437. The next prime is 1081325461. The reversal of 1081325440 is 445231801.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 1081325399 and 1081325408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56664 + ... + 73303.

It is an arithmetic number, because the mean of its divisors is an integer number (43498665).

Almost surely, 2^1081325440 is an apocalyptic number.

1081325440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081325440 is an abundant number, since it is smaller than the sum of its proper divisors (1702589120).

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

1081325440 is a wasteful number, since it uses less digits than its factorization.

1081325440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129999 (or 129987 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1081325440 is about 32883.5131943045. The cubic root of 1081325440 is about 1026.4051131853.

The spelling of 1081325440 in words is "one billion, eighty-one million, three hundred twenty-five thousand, four hundred forty".