991416 has 32 divisors (see below), whose sum is σ = 2509200. Its totient is φ = 326400.

The previous prime is 991409. The next prime is 991427. The reversal of 991416 is 614199.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 991416.

It is an unprimeable number.

991416 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2220 + ... + 2628.

2⁹⁹¹⁴¹⁶ is an apocalyptic number.

It is an amenable number.

991416 is an abundant number, since it is smaller than the sum of its proper divisors (1517784).

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

991416 is a wasteful number, since it uses less digits than its factorization.

991416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 515 counting only the distinct ones).

The product of its digits is 1944, while the sum is 30.

The square root of 991416 is about 995.6987496226. The cubic root of 991416 is about 99.7130440169.

The spelling of 991416 in words is "nine hundred ninety-one thousand, four hundred sixteen".