691830648 has 48 divisors (see below), whose sum is σ = 1876427280. Its totient is φ = 230275584.

The previous prime is 691830631. The next prime is 691830653. The reversal of 691830648 is 846038196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45736 + ... + 58952.

It is an arithmetic number, because the mean of its divisors is an integer number (39092235).

Almost surely, 2^691830648 is an apocalyptic number.

It is an amenable number.

691830648 is an abundant number, since it is smaller than the sum of its proper divisors (1184596632).

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

691830648 is a wasteful number, since it uses less digits than its factorization.

691830648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13956 (or 13949 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 691830648 is about 26302.6737804353. The cubic root of 691830648 is about 884.4363815321.

The spelling of 691830648 in words is "six hundred ninety-one million, eight hundred thirty thousand, six hundred forty-eight".