1691048088 has 96 divisors (see below), whose sum is σ = 4717440000. Its totient is φ = 547005888.

The previous prime is 1691048083. The next prime is 1691048119. The reversal of 1691048088 is 8808401961.

1691048088 is a `hidden beast` number, since 1 + 6 + 91 + 0 + 480 + 88 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691048081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333073 + ... + 338111.

It is an arithmetic number, because the mean of its divisors is an integer number (49140000).

Almost surely, 2^1691048088 is an apocalyptic number.

1691048088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1691048088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2358720000).

1691048088 is an abundant number, since it is smaller than the sum of its proper divisors (3026391912).

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

1691048088 is a wasteful number, since it uses less digits than its factorization.

1691048088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5189 (or 5182 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 1691048088 is about 41122.3550881999. The cubic root of 1691048088 is about 1191.3846105813.

The spelling of 1691048088 in words is "one billion, six hundred ninety-one million, forty-eight thousand, eighty-eight".