1097897984 has 48 divisors (see below), whose sum is σ = 2266205760. Its totient is φ = 531210240.

The previous prime is 1097897981. The next prime is 1097897989. The reversal of 1097897984 is 4897987901.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097897981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54842 + ... + 72134.

It is an arithmetic number, because the mean of its divisors is an integer number (47212620).

Almost surely, 2^1097897984 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 1097897984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1133102880).

1097897984 is an abundant number, since it is smaller than the sum of its proper divisors (1168307776).

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

1097897984 is an equidigital number, since it uses as much as digits as its factorization.

1097897984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17346 (or 17326 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 62.

The square root of 1097897984 is about 33134.5436666932. The cubic root of 1097897984 is about 1031.6221600200.

The spelling of 1097897984 in words is "one billion, ninety-seven million, eight hundred ninety-seven thousand, nine hundred eighty-four".