909021216 has 24 divisors (see below), whose sum is σ = 2386180944. Its totient is φ = 303007040.

The previous prime is 909021193. The next prime is 909021221. The reversal of 909021216 is 612120909.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×909021216² = 1652639142276237312, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4734390 + ... + 4734581.

It is an arithmetic number, because the mean of its divisors is an integer number (99424206).

Almost surely, 2^909021216 is an apocalyptic number.

909021216 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

909021216 is an abundant number, since it is smaller than the sum of its proper divisors (1477159728).

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

909021216 is a wasteful number, since it uses less digits than its factorization.

909021216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9468984 (or 9468976 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 909021216 is about 30149.9787064601. The cubic root of 909021216 is about 968.7045504810.

The spelling of 909021216 in words is "nine hundred nine million, twenty-one thousand, two hundred sixteen".