921444264 has 96 divisors (see below), whose sum is σ = 2692970280. Its totient is φ = 282949632.

The previous prime is 921444221. The next prime is 921444313. The reversal of 921444264 is 462444129.

It is a happy number.

921444264 is a `hidden beast` number, since 92 + 144 + 426 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 824264100 + 97180164 = 28710^2 + 9858^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 891492 + ... + 892524.

Almost surely, 2^921444264 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 921444264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346485140).

921444264 is an abundant number, since it is smaller than the sum of its proper divisors (1771526016).

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

921444264 is a wasteful number, since it uses less digits than its factorization.

921444264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011 (or 2004 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 921444264 is about 30355.3004267788. The cubic root of 921444264 is about 973.0975003583.

The spelling of 921444264 in words is "nine hundred twenty-one million, four hundred forty-four thousand, two hundred sixty-four".