991460 has 24 divisors (see below), whose sum is σ = 2109240. Its totient is φ = 391424.

The previous prime is 991453. The next prime is 991483. The reversal of 991460 is 64199.

It can be written as a sum of positive squares in 4 ways, for example, as 7396 + 984064 = 86^2 + 992^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1502 + ... + 2058.

It is an arithmetic number, because the mean of its divisors is an integer number (87885).

2⁹⁹¹⁴⁶⁰ is an apocalyptic number.

It is an amenable number.

991460 is an abundant number, since it is smaller than the sum of its proper divisors (1117780).

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

991460 is a wasteful number, since it uses less digits than its factorization.

991460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 991460 is about 995.7208444137. The cubic root of 991460 is about 99.7145191155.

The spelling of 991460 in words is "nine hundred ninety-one thousand, four hundred sixty".