689524728 has 32 divisors (see below), whose sum is σ = 1798761600. Its totient is φ = 219848288.

The previous prime is 689524727. The next prime is 689524747. The reversal of 689524728 is 827425986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689524727) 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, 624018 + ... + 625121.

It is an arithmetic number, because the mean of its divisors is an integer number (56211300).

Almost surely, 2^689524728 is an apocalyptic number.

It is an amenable number.

689524728 is an abundant number, since it is smaller than the sum of its proper divisors (1109236872).

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

689524728 is a wasteful number, since it uses less digits than its factorization.

689524728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249171 (or 1249167 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 689524728 is about 26258.8028668483. The cubic root of 689524728 is about 883.4526583156.

The spelling of 689524728 in words is "six hundred eighty-nine million, five hundred twenty-four thousand, seven hundred twenty-eight".