689748638 has 8 divisors (see below), whose sum is σ = 1058684088. Its totient is φ = 336853944.

The previous prime is 689748581. The next prime is 689748677. The reversal of 689748638 is 836847986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4010081 + ... + 4010252.

It is an arithmetic number, because the mean of its divisors is an integer number (132335511).

Almost surely, 2^689748638 is an apocalyptic number.

689748638 is a deficient number, since it is larger than the sum of its proper divisors (368935450).

689748638 is a wasteful number, since it uses less digits than its factorization.

689748638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8020378.

The product of its digits is 13934592, while the sum is 59.

The square root of 689748638 is about 26263.0660434002. The cubic root of 689748638 is about 883.5482760982.

The spelling of 689748638 in words is "six hundred eighty-nine million, seven hundred forty-eight thousand, six hundred thirty-eight".