691830748 has 24 divisors (see below), whose sum is σ = 1395912672. Its totient is φ = 293873664.

The previous prime is 691830743. The next prime is 691830749. The reversal of 691830748 is 847038196.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 691830698 and 691830707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691830743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106165 + ... + 112492.

It is an arithmetic number, because the mean of its divisors is an integer number (58163028).

Almost surely, 2^691830748 is an apocalyptic number.

It is an amenable number.

691830748 is an abundant number, since it is smaller than the sum of its proper divisors (704081924).

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

691830748 is a wasteful number, since it uses less digits than its factorization.

691830748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218781 (or 218779 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 691830748 is about 26302.6756813827. The cubic root of 691830748 is about 884.4364241454.

The spelling of 691830748 in words is "six hundred ninety-one million, eight hundred thirty thousand, seven hundred forty-eight".