689647530 has 64 divisors (see below), whose sum is σ = 1944528768. Its totient is φ = 154325760.

The previous prime is 689647529. The next prime is 689647531. The reversal of 689647530 is 35746986.

It is an interprime number because it is at equal distance from previous prime (689647529) and next prime (689647531).

It is a super-2 number, since 2×689647530² = 951227431270201800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 689647530.

It is not an unprimeable number, because it can be changed into a prime (689647531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76089 + ... + 84668.

It is an arithmetic number, because the mean of its divisors is an integer number (30383262).

Almost surely, 2^689647530 is an apocalyptic number.

689647530 is an abundant number, since it is smaller than the sum of its proper divisors (1254881238).

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

689647530 is a wasteful number, since it uses less digits than its factorization.

689647530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160791.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 689647530 is about 26261.1410643178. The cubic root of 689647530 is about 883.5051018365.

The spelling of 689647530 in words is "six hundred eighty-nine million, six hundred forty-seven thousand, five hundred thirty".