1685288028 has 12 divisors (see below), whose sum is σ = 3932338760. Its totient is φ = 561762672.

The previous prime is 1685288023. The next prime is 1685288029. The reversal of 1685288028 is 8208825861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685288023) 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, 70220323 + ... + 70220346.

Almost surely, 2^1685288028 is an apocalyptic number.

It is an amenable number.

1685288028 is an abundant number, since it is smaller than the sum of its proper divisors (2247050732).

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

1685288028 is a wasteful number, since it uses less digits than its factorization.

1685288028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140440676 (or 140440674 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 48.

The square root of 1685288028 is about 41052.2597185587. The cubic root of 1685288028 is about 1190.0303709030.

The spelling of 1685288028 in words is "one billion, six hundred eighty-five million, two hundred eighty-eight thousand, twenty-eight".