917139456 has 104 divisors (see below), whose sum is σ = 2717446160. Its totient is φ = 305676288.

The previous prime is 917139437. The next prime is 917139469. The reversal of 917139456 is 654931719.

It is a super-2 number, since 2×917139456² = 1682289563503951872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106446 + ... + 114738.

It is an arithmetic number, because the mean of its divisors is an integer number (26129290).

Almost surely, 2^917139456 is an apocalyptic number.

917139456 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 917139456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1358723080).

917139456 is an abundant number, since it is smaller than the sum of its proper divisors (1800306704).

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

917139456 is an equidigital number, since it uses as much as digits as its factorization.

917139456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8326 (or 8298 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 917139456 is about 30284.3103933373. The cubic root of 917139456 is about 971.5797604196.

The spelling of 917139456 in words is "nine hundred seventeen million, one hundred thirty-nine thousand, four hundred fifty-six".