909381312 has 168 divisors, whose sum is σ = 3052157472. Its totient is φ = 253440000.

The previous prime is 909381293. The next prime is 909381313. The reversal of 909381312 is 213183909.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×909381312² = 1653948741229682688, which contains 22 as substring.

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 (909381313) 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, 162562 + ... + 168062.

It is an arithmetic number, because the mean of its divisors is an integer number (18167604).

Almost surely, 2^909381312 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 909381312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1526078736).

909381312 is an abundant number, since it is smaller than the sum of its proper divisors (2142776160).

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

909381312 is a wasteful number, since it uses less digits than its factorization.

909381312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5567 (or 5554 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 909381312 is about 30155.9498606826. The cubic root of 909381312 is about 968.8324464996.

The spelling of 909381312 in words is "nine hundred nine million, three hundred eighty-one thousand, three hundred twelve".