642104386 has 32 divisors (see below), whose sum is σ = 1253035008. Its totient is φ = 239292240.

The previous prime is 642104383. The next prime is 642104431. The reversal of 642104386 is 683401246.

It is not an unprimeable number, because it can be changed into a prime (642104383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87100 + ... + 94183.

It is an arithmetic number, because the mean of its divisors is an integer number (39157344).

Almost surely, 2^642104386 is an apocalyptic number.

642104386 is a deficient number, since it is larger than the sum of its proper divisors (610930622).

642104386 is a wasteful number, since it uses less digits than its factorization.

642104386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181326.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 642104386 is about 25339.7787283157. The cubic root of 642104386 is about 862.7173764498.

The spelling of 642104386 in words is "six hundred forty-two million, one hundred four thousand, three hundred eighty-six".