1097331920 has 20 divisors (see below), whose sum is σ = 2551296900. Its totient is φ = 438932736.

The previous prime is 1097331919. The next prime is 1097331923. The reversal of 1097331920 is 291337901.

1097331920 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 807923776 + 289408144 = 28424^2 + 17012^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097331923) 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, 6858245 + ... + 6858404.

It is an arithmetic number, because the mean of its divisors is an integer number (127564845).

Almost surely, 2^1097331920 is an apocalyptic number.

1097331920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1097331920 is an abundant number, since it is smaller than the sum of its proper divisors (1453964980).

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

1097331920 is a wasteful number, since it uses less digits than its factorization.

1097331920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13716662 (or 13716656 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 1097331920 is about 33126.0006641309. Note that the first 3 decimals coincide. The cubic root of 1097331920 is about 1031.4448318999. Note that the first 3 decimals are identical.

The spelling of 1097331920 in words is "one billion, ninety-seven million, three hundred thirty-one thousand, nine hundred twenty".