1693728904 has 48 divisors (see below), whose sum is σ = 3911553180. Its totient is φ = 683182080.

The previous prime is 1693728899. The next prime is 1693728917. The reversal of 1693728904 is 4098273961.

It can be written as a sum of positive squares in 2 ways, for example, as 1676902500 + 16826404 = 40950^2 + 4102^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 120417 + ... + 133744.

Almost surely, 2^1693728904 is an apocalyptic number.

1693728904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1693728904 is an abundant number, since it is smaller than the sum of its proper divisors (2217824276).

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

1693728904 is a wasteful number, since it uses less digits than its factorization.

1693728904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254198 (or 254187 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 1693728904 is about 41154.9377839403. The cubic root of 1693728904 is about 1192.0138449363.

The spelling of 1693728904 in words is "one billion, six hundred ninety-three million, seven hundred twenty-eight thousand, nine hundred four".