923421664 has 72 divisors (see below), whose sum is σ = 2085365520. Its totient is φ = 401448960.

The previous prime is 923421613. The next prime is 923421701. The reversal of 923421664 is 466124329.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83872 + ... + 94240.

It is an arithmetic number, because the mean of its divisors is an integer number (28963410).

Almost surely, 2^923421664 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 923421664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1042682760).

923421664 is an abundant number, since it is smaller than the sum of its proper divisors (1161943856).

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

923421664 is a wasteful number, since it uses less digits than its factorization.

923421664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10424 (or 10405 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The square root of 923421664 is about 30387.8538893420. The cubic root of 923421664 is about 973.7930852779.

The spelling of 923421664 in words is "nine hundred twenty-three million, four hundred twenty-one thousand, six hundred sixty-four".