917473920 has 128 divisors (see below), whose sum is σ = 3190380480. Its totient is φ = 222412800.

The previous prime is 917473913. The next prime is 917474011. The reversal of 917473920 is 29374719.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601 + ... + 42840.

Almost surely, 2^917473920 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 917473920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1595190240).

917473920 is an abundant number, since it is smaller than the sum of its proper divisors (2272906560).

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

917473920 is a wasteful number, since it uses less digits than its factorization.

917473920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43474 (or 43462 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 917473920 is about 30289.8319572757. The cubic root of 917473920 is about 971.6978518602.

The spelling of 917473920 in words is "nine hundred seventeen million, four hundred seventy-three thousand, nine hundred twenty".