691460 has 48 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 215040.

The previous prime is 691451. The next prime is 691463. The reversal of 691460 is 64196.

691460 = T₂₉ + T₃₀ + ... + T₁₆₀.

It is not an unprimeable number, because it can be changed into a prime (691463) by changing a digit.

691460 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1316 + ... + 1764.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2⁶⁹¹⁴⁶⁰ 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 691460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907200).

691460 is an abundant number, since it is smaller than the sum of its proper divisors (1122940).

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

691460 is a wasteful number, since it uses less digits than its factorization.

691460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 691460 is about 831.5407386292. The cubic root of 691460 is about 88.4278407835.

Subtracting from 691460 its reverse (64196), we obtain a square (627264 = 792²).

The spelling of 691460 in words is "six hundred ninety-one thousand, four hundred sixty".