991563032 has 48 divisors (see below), whose sum is σ = 1968931800. Its totient is φ = 468074880.

The previous prime is 991563031. The next prime is 991563043. The reversal of 991563032 is 230365199.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991563031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1504319 + ... + 1504977.

Almost surely, 2^991563032 is an apocalyptic number.

It is an amenable number.

991563032 is a deficient number, since it is larger than the sum of its proper divisors (977368768).

991563032 is a wasteful number, since it uses less digits than its factorization.

991563032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1201 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 991563032 is about 31489.0938580328. The cubic root of 991563032 is about 997.1797308929.

The spelling of 991563032 in words is "nine hundred ninety-one million, five hundred sixty-three thousand, thirty-two".