916217856 has 252 divisors, whose sum is σ = 2876920332. Its totient is φ = 280756224.

The previous prime is 916217849. The next prime is 916217881. The reversal of 916217856 is 658712619.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21307371 + ... + 21307413.

Almost surely, 2^916217856 is an apocalyptic number.

916217856 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 916217856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1438460166).

916217856 is an abundant number, since it is smaller than the sum of its proper divisors (1960702476).

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

916217856 is a wasteful number, since it uses less digits than its factorization.

916217856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 65 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 916217856 is about 30269.0907692980. The cubic root of 916217856 is about 971.2542163271.

The spelling of 916217856 in words is "nine hundred sixteen million, two hundred seventeen thousand, eight hundred fifty-six".