917389540 has 48 divisors (see below), whose sum is σ = 2055755520. Its totient is φ = 342869760.

The previous prime is 917389537. The next prime is 917389549. The reversal of 917389540 is 45983719.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (917389549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11205 + ... + 44275.

It is an arithmetic number, because the mean of its divisors is an integer number (42828240).

Almost surely, 2^917389540 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 917389540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027877760).

917389540 is an abundant number, since it is smaller than the sum of its proper divisors (1138365980).

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

917389540 is a wasteful number, since it uses less digits than its factorization.

917389540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33172 (or 33170 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 917389540 is about 30288.4390485875. The cubic root of 917389540 is about 971.6680619568.

The spelling of 917389540 in words is "nine hundred seventeen million, three hundred eighty-nine thousand, five hundred forty".