1097805984 has 96 divisors (see below), whose sum is σ = 3228797376. Its totient is φ = 323665920.

The previous prime is 1097805977. The next prime is 1097806001. The reversal of 1097805984 is 4895087901.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25024 + ... + 53120.

It is an arithmetic number, because the mean of its divisors is an integer number (33633306).

Almost surely, 2^1097805984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097805984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1614398688).

1097805984 is an abundant number, since it is smaller than the sum of its proper divisors (2130991392).

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

1097805984 is a wasteful number, since it uses less digits than its factorization.

1097805984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28158 (or 28150 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 51.

The square root of 1097805984 is about 33133.1553583416. The cubic root of 1097805984 is about 1031.5933437756.

The spelling of 1097805984 in words is "one billion, ninety-seven million, eight hundred five thousand, nine hundred eighty-four".