1696849640 has 16 divisors (see below), whose sum is σ = 3817911780. Its totient is φ = 678739840.

The previous prime is 1696849619. The next prime is 1696849673. The reversal of 1696849640 is 469486961.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1620706564 + 76143076 = 40258^2 + 8726^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21210581 + ... + 21210660.

Almost surely, 2^1696849640 is an apocalyptic number.

1696849640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1696849640 is an abundant number, since it is smaller than the sum of its proper divisors (2121062140).

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

1696849640 is a wasteful number, since it uses less digits than its factorization.

1696849640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42421252 (or 42421248 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 53.

The square root of 1696849640 is about 41192.8348138363. The cubic root of 1696849640 is about 1192.7455004253.

The spelling of 1696849640 in words is "one billion, six hundred ninety-six million, eight hundred forty-nine thousand, six hundred forty".