917072772 has 96 divisors (see below), whose sum is σ = 2808314880. Its totient is φ = 225659520.

The previous prime is 917072759. The next prime is 917072773. The reversal of 917072772 is 277270719.

917072772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (917072773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8563 + ... + 43674.

It is an arithmetic number, because the mean of its divisors is an integer number (29253280).

Almost surely, 2^917072772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 917072772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1404157440).

917072772 is an abundant number, since it is smaller than the sum of its proper divisors (1891242108).

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

917072772 is a wasteful number, since it uses less digits than its factorization.

917072772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52281 (or 52279 counting only the distinct ones).

The product of its (nonzero) digits is 86436, while the sum is 42.

The square root of 917072772 is about 30283.2094071946. The cubic root of 917072772 is about 971.5562124213.

The spelling of 917072772 in words is "nine hundred seventeen million, seventy-two thousand, seven hundred seventy-two".