991306744 has 16 divisors (see below), whose sum is σ = 1859272920. Its totient is φ = 495500640.

The previous prime is 991306727. The next prime is 991306763. The reversal of 991306744 is 447603199.

It is a self number, because there is not a number n which added to its sum of digits gives 991306744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11347 + ... + 45949.

Almost surely, 2^991306744 is an apocalyptic number.

It is an amenable number.

991306744 is a deficient number, since it is larger than the sum of its proper divisors (867966176).

991306744 is a wasteful number, since it uses less digits than its factorization.

991306744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38190 (or 38186 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 991306744 is about 31485.0241225888. The cubic root of 991306744 is about 997.0938102429.

The spelling of 991306744 in words is "nine hundred ninety-one million, three hundred six thousand, seven hundred forty-four".