1690000728 has 64 divisors (see below), whose sum is σ = 4556294400. Its totient is φ = 519281280.

The previous prime is 1690000727. The next prime is 1690000751. The reversal of 1690000728 is 8270000961.

It is a super-2 number, since 2×1690000728² = 5712204921281059968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690000727) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 249693 + ... + 256371.

It is an arithmetic number, because the mean of its divisors is an integer number (71192100).

Almost surely, 2^1690000728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1690000728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2278147200).

1690000728 is an abundant number, since it is smaller than the sum of its proper divisors (2866293672).

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

1690000728 is a wasteful number, since it uses less digits than its factorization.

1690000728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7512 (or 7508 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1690000728 is about 41109.6184365654. The cubic root of 1690000728 is about 1191.1385962317.

The spelling of 1690000728 in words is "one billion, six hundred ninety million, seven hundred twenty-eight", and thus it is an aban number.