1685630928 has 40 divisors (see below), whose sum is σ = 4360934176. Its totient is φ = 561052800.

The previous prime is 1685630857. The next prime is 1685630929. The reversal of 1685630928 is 8290365861.

It is a happy number.

1685630928 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685630929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7758 + ... + 58578.

Almost surely, 2^1685630928 is an apocalyptic number.

It is an amenable number.

1685630928 is an abundant number, since it is smaller than the sum of its proper divisors (2675303248).

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

1685630928 is a wasteful number, since it uses less digits than its factorization.

1685630928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51523 (or 51517 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 1685630928 is about 41056.4358901257. The cubic root of 1685630928 is about 1190.1110759486. Note that the first 3 decimals are identical.

The spelling of 1685630928 in words is "one billion, six hundred eighty-five million, six hundred thirty thousand, nine hundred twenty-eight".