1097728884 has 72 divisors (see below), whose sum is σ = 3177661760. Its totient is φ = 312999552.

The previous prime is 1097728787. The next prime is 1097728901. The reversal of 1097728884 is 4888277901.

It is a happy number.

It is a super-3 number, since 3×1097728884³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1097728884.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 127632 + ... + 135960.

Almost surely, 2^1097728884 is an apocalyptic number.

1097728884 is a gapful number since it is divisible by the number (14) 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 1097728884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1588830880).

1097728884 is an abundant number, since it is smaller than the sum of its proper divisors (2079932876).

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

1097728884 is a wasteful number, since it uses less digits than its factorization.

1097728884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8869 (or 8864 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The square root of 1097728884 is about 33131.9918507777. The cubic root of 1097728884 is about 1031.5691932700.

The spelling of 1097728884 in words is "one billion, ninety-seven million, seven hundred twenty-eight thousand, eight hundred eighty-four".