991446 has 16 divisors (see below), whose sum is σ = 1998000. Its totient is φ = 327968.

The previous prime is 991429. The next prime is 991447. The reversal of 991446 is 644199.

991446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340 + ... + 1448.

It is an arithmetic number, because the mean of its divisors is an integer number (124875).

2⁹⁹¹⁴⁴⁶ is an apocalyptic number.

991446 is an abundant number, since it is smaller than the sum of its proper divisors (1006554).

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

991446 is a wasteful number, since it uses less digits than its factorization.

991446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263.

The product of its digits is 7776, while the sum is 33.

The square root of 991446 is about 995.7138143061. The cubic root of 991446 is about 99.7140497707.

The spelling of 991446 in words is "nine hundred ninety-one thousand, four hundred forty-six".