691363488 has 96 divisors (see below), whose sum is σ = 1972131840. Its totient is φ = 211265280.

The previous prime is 691363459. The next prime is 691363529. The reversal of 691363488 is 884363196.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×691363488² = 955966945079052288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50431 + ... + 62657.

It is an arithmetic number, because the mean of its divisors is an integer number (20543040).

Almost surely, 2^691363488 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 691363488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (986065920).

691363488 is an abundant number, since it is smaller than the sum of its proper divisors (1280768352).

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

691363488 is a wasteful number, since it uses less digits than its factorization.

691363488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12290 (or 12282 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 691363488 is about 26293.7918147992. The cubic root of 691363488 is about 884.2372642410.

The spelling of 691363488 in words is "six hundred ninety-one million, three hundred sixty-three thousand, four hundred eighty-eight".