1097971488 has 72 divisors (see below), whose sum is σ = 3140547228. Its totient is φ = 363858432.

The previous prime is 1097971471. The next prime is 1097971507. The reversal of 1097971488 is 8841797901.

1097971488 is a `hidden beast` number, since 1 + 0 + 97 + 9 + 71 + 488 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1097729424 + 242064 = 33132^2 + 492^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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 11 ways as a sum of consecutive naturals, for example, 38806 + ... + 60842.

Almost surely, 2^1097971488 is an apocalyptic number.

1097971488 is a gapful number since it is divisible by the number (18) 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 1097971488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1570273614).

1097971488 is an abundant number, since it is smaller than the sum of its proper divisors (2042575740).

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

1097971488 is a wasteful number, since it uses less digits than its factorization.

1097971488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22226 (or 22215 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The square root of 1097971488 is about 33135.6528229036. The cubic root of 1097971488 is about 1031.6451817896.

The spelling of 1097971488 in words is "one billion, ninety-seven million, nine hundred seventy-one thousand, four hundred eighty-eight".