641589078 has 32 divisors (see below), whose sum is σ = 1463174496. Its totient is φ = 185799168.

The previous prime is 641589077. The next prime is 641589089. The reversal of 641589078 is 870985146.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641589073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240601 + ... + 243252.

It is an arithmetic number, because the mean of its divisors is an integer number (45724203).

Almost surely, 2^641589078 is an apocalyptic number.

641589078 is an abundant number, since it is smaller than the sum of its proper divisors (821585418).

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

641589078 is a wasteful number, since it uses less digits than its factorization.

641589078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483888.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 641589078 is about 25329.6087218101. The cubic root of 641589078 is about 862.4865291742.

The spelling of 641589078 in words is "six hundred forty-one million, five hundred eighty-nine thousand, seventy-eight".