642380005 has 16 divisors (see below), whose sum is σ = 793453248. Its totient is φ = 498960000.

The previous prime is 642379999. The next prime is 642380009. The reversal of 642380005 is 500083246.

642380005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-642380005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642380009) 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, 35830 + ... + 50680.

It is an arithmetic number, because the mean of its divisors is an integer number (49590828).

Almost surely, 2^642380005 is an apocalyptic number.

It is an amenable number.

642380005 is a deficient number, since it is larger than the sum of its proper divisors (151073243).

642380005 is a wasteful number, since it uses less digits than its factorization.

642380005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15108.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 642380005 is about 25345.2166098457. The cubic root of 642380005 is about 862.8407973410.

The spelling of 642380005 in words is "six hundred forty-two million, three hundred eighty thousand, five".