691976032 has 48 divisors (see below), whose sum is σ = 1494524304. Its totient is φ = 312768000.

The previous prime is 691975993. The next prime is 691976039. The reversal of 691976032 is 230679196.

It is a self number, because there is not a number n which added to its sum of digits gives 691976032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691976039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58282 + ... + 69142.

It is an arithmetic number, because the mean of its divisors is an integer number (31135923).

Almost surely, 2^691976032 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 691976032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747262152).

691976032 is an abundant number, since it is smaller than the sum of its proper divisors (802548272).

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

691976032 is a wasteful number, since it uses less digits than its factorization.

691976032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11063 (or 11055 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 691976032 is about 26305.4373086630. The cubic root of 691976032 is about 884.4983301671.

The spelling of 691976032 in words is "six hundred ninety-one million, nine hundred seventy-six thousand, thirty-two".