1081312800 has 288 divisors, whose sum is σ = 3869752320. Its totient is φ = 261043200.

The previous prime is 1081312783. The next prime is 1081312807. The reversal of 1081312800 is 82131801.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1081312807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1048285 + ... + 1049315.

It is an arithmetic number, because the mean of its divisors is an integer number (13436640).

Almost surely, 2^1081312800 is an apocalyptic number.

1081312800 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 1081312800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934876160).

1081312800 is an abundant number, since it is smaller than the sum of its proper divisors (2788439520).

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

1081312800 is a wasteful number, since it uses less digits than its factorization.

1081312800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 1081312800 is about 32883.3210001666. The cubic root of 1081312800 is about 1026.4011138308.

The spelling of 1081312800 in words is "one billion, eighty-one million, three hundred twelve thousand, eight hundred".