691340232 has 64 divisors (see below), whose sum is σ = 1984723200. Its totient is φ = 198469440.

The previous prime is 691340231. The next prime is 691340257. The reversal of 691340232 is 232043196.

It is a self number, because there is not a number n which added to its sum of digits gives 691340232.

It is not an unprimeable number, because it can be changed into a prime (691340231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63898 + ... + 73929.

It is an arithmetic number, because the mean of its divisors is an integer number (31011300).

Almost surely, 2^691340232 is an apocalyptic number.

It is an amenable number.

691340232 is an abundant number, since it is smaller than the sum of its proper divisors (1293382968).

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

691340232 is a wasteful number, since it uses less digits than its factorization.

691340232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137866 (or 137862 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 691340232 is about 26293.3495774122. The cubic root of 691340232 is about 884.2273495084.

The spelling of 691340232 in words is "six hundred ninety-one million, three hundred forty thousand, two hundred thirty-two".