991927296 has 110 divisors (see below), whose sum is σ = 2962336520. Its totient is φ = 330614784.

The previous prime is 991927291. The next prime is 991927331. The reversal of 991927296 is 692729199.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991927291) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 76965 + ... + 88923.

It is an arithmetic number, because the mean of its divisors is an integer number (26930332).

Almost surely, 2^991927296 is an apocalyptic number.

991927296 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 991927296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481168260).

991927296 is an abundant number, since it is smaller than the sum of its proper divisors (1970409224).

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

991927296 is a wasteful number, since it uses less digits than its factorization.

991927296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11991 (or 11964 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 991927296 is about 31494.8772977448. The cubic root of 991927296 is about 997.3018250664.

The spelling of 991927296 in words is "nine hundred ninety-one million, nine hundred twenty-seven thousand, two hundred ninety-six".