691984452 has 12 divisors (see below), whose sum is σ = 1614630416. Its totient is φ = 230661480.

The previous prime is 691984441. The next prime is 691984453. The reversal of 691984452 is 254489196.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (691984453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28832674 + ... + 28832697.

Almost surely, 2^691984452 is an apocalyptic number.

It is an amenable number.

691984452 is an abundant number, since it is smaller than the sum of its proper divisors (922645964).

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

691984452 is a wasteful number, since it uses less digits than its factorization.

691984452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57665378 (or 57665376 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 691984452 is about 26305.5973511342. The cubic root of 691984452 is about 884.5019176930.

The spelling of 691984452 in words is "six hundred ninety-one million, nine hundred eighty-four thousand, four hundred fifty-two".