691342272 has 84 divisors (see below), whose sum is σ = 2006823520. Its totient is φ = 227515392.

The previous prime is 691342243. The next prime is 691342279. The reversal of 691342272 is 272243196.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691342279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37908 + ... + 53100.

Almost surely, 2^691342272 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 691342272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003411760).

691342272 is an abundant number, since it is smaller than the sum of its proper divisors (1315481248).

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

691342272 is a wasteful number, since it uses less digits than its factorization.

691342272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15290 (or 15277 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 691342272 is about 26293.3883704630. The cubic root of 691342272 is about 884.2282192306.

It can be divided in two parts, 69 and 1342272, that added together give a triangular number (1342341 = T₁₆₃₈).

The spelling of 691342272 in words is "six hundred ninety-one million, three hundred forty-two thousand, two hundred seventy-two".