1697390800728 has 32 divisors (see below), whose sum is σ = 4849688002560. Its totient is φ = 484968800160.

The previous prime is 1697390800709. The next prime is 1697390800751. The reversal of 1697390800728 is 8270080937961.

It is a super-2 number, since 2×1697390800728² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5051758168 + ... + 5051758503.

It is an arithmetic number, because the mean of its divisors is an integer number (151552750080).

Almost surely, 2^{1697390800728} is an apocalyptic number.

It is an amenable number.

1697390800728 is an abundant number, since it is smaller than the sum of its proper divisors (3152297201832).

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

1697390800728 is a wasteful number, since it uses less digits than its factorization.

1697390800728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10103516687 (or 10103516683 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 1697390800728 in words is "one trillion, six hundred ninety-seven billion, three hundred ninety million, eight hundred thousand, seven hundred twenty-eight".