689696628 has 24 divisors (see below), whose sum is σ = 1624059360. Its totient is φ = 227789280.

The previous prime is 689696617. The next prime is 689696669. The reversal of 689696628 is 826696986.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262338 + ... + 264953.

It is an arithmetic number, because the mean of its divisors is an integer number (67669140).

Almost surely, 2^689696628 is an apocalyptic number.

It is an amenable number.

689696628 is an abundant number, since it is smaller than the sum of its proper divisors (934362732).

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

689696628 is a wasteful number, since it uses less digits than its factorization.

689696628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527407 (or 527405 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 60.

The square root of 689696628 is about 26262.0758509300. The cubic root of 689696628 is about 883.5260677658.

The spelling of 689696628 in words is "six hundred eighty-nine million, six hundred ninety-six thousand, six hundred twenty-eight".