1697740628 has 12 divisors (see below), whose sum is σ = 3043510932. Its totient is φ = 828166080.

The previous prime is 1697740621. The next prime is 1697740643. The reversal of 1697740628 is 8260477961.

It can be written as a sum of positive squares in 2 ways, for example, as 442597444 + 1255143184 = 21038^2 + 35428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1697740621) 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, 5175875 + ... + 5176202.

It is an arithmetic number, because the mean of its divisors is an integer number (253625911).

Almost surely, 2^1697740628 is an apocalyptic number.

It is an amenable number.

1697740628 is a deficient number, since it is larger than the sum of its proper divisors (1345770304).

1697740628 is a wasteful number, since it uses less digits than its factorization.

1697740628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10352122 (or 10352120 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 1697740628 is about 41203.6482365336. The cubic root of 1697740628 is about 1192.9542276162.

The spelling of 1697740628 in words is "one billion, six hundred ninety-seven million, seven hundred forty thousand, six hundred twenty-eight".