1097970816 has 64 divisors (see below), whose sum is σ = 2987661600. Its totient is φ = 357058560.

The previous prime is 1097970787. The next prime is 1097970817. The reversal of 1097970816 is 6180797901.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1097970817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19126 + ... + 50613.

Almost surely, 2^1097970816 is an apocalyptic number.

1097970816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1097970816 is an abundant number, since it is smaller than the sum of its proper divisors (1889690784).

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

1097970816 is an equidigital number, since it uses as much as digits as its factorization.

1097970816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69797 (or 69785 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 48.

The square root of 1097970816 is about 33135.6426827668. The cubic root of 1097970816 is about 1031.6449713209.

The spelling of 1097970816 in words is "one billion, ninety-seven million, nine hundred seventy thousand, eight hundred sixteen".