1081108728 has 64 divisors (see below), whose sum is σ = 3432096000. Its totient is φ = 308887776.

The previous prime is 1081108723. The next prime is 1081108729. The reversal of 1081108728 is 8278011801.

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

It is a junction number, because it is equal to n+sod(n) for n = 1081108692 and 1081108701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081108723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355998 + ... + 359021.

It is an arithmetic number, because the mean of its divisors is an integer number (53626500).

Almost surely, 2^1081108728 is an apocalyptic number.

1081108728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1081108728 is an abundant number, since it is smaller than the sum of its proper divisors (2350987272).

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

1081108728 is a wasteful number, since it uses less digits than its factorization.

1081108728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715041 (or 715031 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 36.

The square root of 1081108728 is about 32880.2178824898. The cubic root of 1081108728 is about 1026.3365401921.

The spelling of 1081108728 in words is "one billion, eighty-one million, one hundred eight thousand, seven hundred twenty-eight".