1097104428 has 72 divisors (see below), whose sum is σ = 3176595968. Its totient is φ = 312748128.

The previous prime is 1097104391. The next prime is 1097104471. The reversal of 1097104428 is 8244017901.

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

It is a junction number, because it is equal to n+sod(n) for n = 1097104392 and 1097104401.

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, 111975 + ... + 121377.

Almost surely, 2^1097104428 is an apocalyptic number.

1097104428 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 1097104428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1588297984).

1097104428 is an abundant number, since it is smaller than the sum of its proper divisors (2079491540).

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

1097104428 is a wasteful number, since it uses less digits than its factorization.

1097104428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9883 (or 9878 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1097104428 is about 33122.5667483666. The cubic root of 1097104428 is about 1031.3735494069.

The spelling of 1097104428 in words is "one billion, ninety-seven million, one hundred four thousand, four hundred twenty-eight".