664292928 has 112 divisors (see below), whose sum is σ = 1924279616. Its totient is φ = 201000960.

The previous prime is 664292921. The next prime is 664292929. The reversal of 664292928 is 829292466.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (664292921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150075 + ... + 154437.

It is an arithmetic number, because the mean of its divisors is an integer number (17181068).

Almost surely, 2^664292928 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 664292928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962139808).

664292928 is an abundant number, since it is smaller than the sum of its proper divisors (1259986688).

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

664292928 is a wasteful number, since it uses less digits than its factorization.

664292928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4452 (or 4442 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 664292928 is about 25773.8807322452. The cubic root of 664292928 is about 872.5424058557.

The spelling of 664292928 in words is "six hundred sixty-four million, two hundred ninety-two thousand, nine hundred twenty-eight".