538450668 has 72 divisors (see below), whose sum is σ = 1560188448. Its totient is φ = 153381888.

The previous prime is 538450667. The next prime is 538450669. The reversal of 538450668 is 866054835.

538450668 is a `hidden beast` number, since 5 + 3 + 84 + 506 + 68 = 666.

It is an interprime number because it is at equal distance from previous prime (538450667) and next prime (538450669).

It is not an unprimeable number, because it can be changed into a prime (538450667) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 85930 + ... + 91982.

It is an arithmetic number, because the mean of its divisors is an integer number (21669284).

Almost surely, 2^538450668 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 538450668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780094224).

538450668 is an abundant number, since it is smaller than the sum of its proper divisors (1021737780).

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

538450668 is a wasteful number, since it uses less digits than its factorization.

538450668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423 (or 6418 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 538450668 is about 23204.5398144415. The cubic root of 538450668 is about 813.5457363530.

The spelling of 538450668 in words is "five hundred thirty-eight million, four hundred fifty thousand, six hundred sixty-eight".