688038955 has 8 divisors (see below), whose sum is σ = 852280704. Its totient is φ = 532675200.

The previous prime is 688038929. The next prime is 688038961. The reversal of 688038955 is 559830886.

It is a happy number.

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

It is not a de Polignac number, because 688038955 - 2¹¹ = 688036907 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 2219326 + ... + 2219635.

It is an arithmetic number, because the mean of its divisors is an integer number (106535088).

Almost surely, 2^688038955 is an apocalyptic number.

688038955 is a deficient number, since it is larger than the sum of its proper divisors (164241749).

688038955 is a wasteful number, since it uses less digits than its factorization.

688038955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4438997.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The square root of 688038955 is about 26230.4966594230. The cubic root of 688038955 is about 882.8176537596.

The spelling of 688038955 in words is "six hundred eighty-eight million, thirty-eight thousand, nine hundred fifty-five".