691384848 has 160 divisors (see below), whose sum is σ = 2238047232. Its totient is φ = 178675200.

The previous prime is 691384823. The next prime is 691384867. The reversal of 691384848 is 848483196.

It is a self number, because there is not a number n which added to its sum of digits gives 691384848.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1045638 + ... + 1046298.

Almost surely, 2^691384848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691384848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119023616).

691384848 is an abundant number, since it is smaller than the sum of its proper divisors (1546662384).

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

691384848 is a wasteful number, since it uses less digits than its factorization.

691384848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 967 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 51.

The square root of 691384848 is about 26294.1979911919. The cubic root of 691384848 is about 884.2463704559.

The spelling of 691384848 in words is "six hundred ninety-one million, three hundred eighty-four thousand, eight hundred forty-eight".