662388128 has 48 divisors (see below), whose sum is σ = 1340982216. Its totient is φ = 321884160.

The previous prime is 662388121. The next prime is 662388149. The reversal of 662388128 is 821883266.

It can be written as a sum of positive squares in 4 ways, for example, as 215150224 + 447237904 = 14668^2 + 21148^2 .

It is not an unprimeable number, because it can be changed into a prime (662388121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 409850 + ... + 411462.

Almost surely, 2^662388128 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 662388128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (670491108).

662388128 is an abundant number, since it is smaller than the sum of its proper divisors (678594088).

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

662388128 is a wasteful number, since it uses less digits than its factorization.

662388128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977 (or 1969 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 662388128 is about 25736.9020668767. The cubic root of 662388128 is about 871.7076286046.

The spelling of 662388128 in words is "six hundred sixty-two million, three hundred eighty-eight thousand, one hundred twenty-eight".