689215240 has 64 divisors (see below), whose sum is σ = 1849340160. Its totient is φ = 226026240.

The previous prime is 689215231. The next prime is 689215273. The reversal of 689215240 is 42512986.

It is a self number, because there is not a number n which added to its sum of digits gives 689215240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47071 + ... + 59950.

It is an arithmetic number, because the mean of its divisors is an integer number (28895940).

Almost surely, 2^689215240 is an apocalyptic number.

It is an amenable number.

689215240 is an abundant number, since it is smaller than the sum of its proper divisors (1160124920).

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

689215240 is a wasteful number, since it uses less digits than its factorization.

689215240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107062 (or 107058 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 689215240 is about 26252.9091721280. The cubic root of 689215240 is about 883.3204615030.

The spelling of 689215240 in words is "six hundred eighty-nine million, two hundred fifteen thousand, two hundred forty".