1697320680 has 128 divisors (see below), whose sum is σ = 5734195200. Its totient is φ = 398188800.

The previous prime is 1697320679. The next prime is 1697320727. The reversal of 1697320680 is 860237961.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20181 + ... + 61659.

It is an arithmetic number, because the mean of its divisors is an integer number (44798400).

Almost surely, 2^1697320680 is an apocalyptic number.

1697320680 is a gapful number since it is divisible by the number (10) 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 1697320680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2867097600).

1697320680 is an abundant number, since it is smaller than the sum of its proper divisors (4036874520).

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

1697320680 is a wasteful number, since it uses less digits than its factorization.

1697320680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41535 (or 41531 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1697320680 is about 41198.5519162992. The cubic root of 1697320680 is about 1192.8558576520.

The spelling of 1697320680 in words is "one billion, six hundred ninety-seven million, three hundred twenty thousand, six hundred eighty".