1081204992 has 324 divisors, whose sum is σ = 3709265196. Its totient is φ = 301916160.

The previous prime is 1081204987. The next prime is 1081205003. The reversal of 1081204992 is 2994021801.

It can be written as a sum of positive squares in 2 ways, for example, as 146313216 + 934891776 = 12096^2 + 30576^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6886578 + ... + 6886734.

Almost surely, 2^1081204992 is an apocalyptic number.

1081204992 is a gapful number since it is divisible by the number (12) 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 1081204992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1854632598).

1081204992 is an abundant number, since it is smaller than the sum of its proper divisors (2628060204).

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

1081204992 is a wasteful number, since it uses less digits than its factorization.

1081204992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1081204992 is about 32881.6817088178. The cubic root of 1081204992 is about 1026.3670016144.

The spelling of 1081204992 in words is "one billion, eighty-one million, two hundred four thousand, nine hundred ninety-two".