916523280 has 120 divisors (see below), whose sum is σ = 3085368000. Its totient is φ = 243820800.

The previous prime is 916523269. The next prime is 916523281. The reversal of 916523280 is 82325619.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (916523281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358005 + ... + 360555.

It is an arithmetic number, because the mean of its divisors is an integer number (25711400).

Almost surely, 2^916523280 is an apocalyptic number.

916523280 is a gapful number since it is divisible by the number (90) 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 916523280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1542684000).

916523280 is an abundant number, since it is smaller than the sum of its proper divisors (2168844720).

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

916523280 is a wasteful number, since it uses less digits than its factorization.

916523280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069 (or 3060 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 916523280 is about 30274.1354955018. The cubic root of 916523280 is about 971.3621278496.

Adding to 916523280 its reverse (82325619), we get a palindrome (998848899).

The spelling of 916523280 in words is "nine hundred sixteen million, five hundred twenty-three thousand, two hundred eighty".