544639680 has 336 divisors, whose sum is σ = 2086112160. Its totient is φ = 133705728.

The previous prime is 544639673. The next prime is 544639681. The reversal of 544639680 is 86936445.

544639680 is a `hidden beast` number, since 5 + 4 + 4 + 639 + 6 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (544639681) 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 47 ways as a sum of consecutive naturals, for example, 1459974 + ... + 1460346.

Almost surely, 2^544639680 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 544639680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043056080).

544639680 is an abundant number, since it is smaller than the sum of its proper divisors (1541472480).

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

544639680 is a wasteful number, since it uses less digits than its factorization.

544639680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 544639680 is about 23337.5165773910. The cubic root of 544639680 is about 816.6508647968.

The spelling of 544639680 in words is "five hundred forty-four million, six hundred thirty-nine thousand, six hundred eighty".