642386092 has 24 divisors (see below), whose sum is σ = 1164465792. Its totient is φ = 309753600.

The previous prime is 642386081. The next prime is 642386093. The reversal of 642386092 is 290683246.

It is not an unprimeable number, because it can be changed into a prime (642386093) 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 7 ways as a sum of consecutive naturals, for example, 27492 + ... + 45172.

It is an arithmetic number, because the mean of its divisors is an integer number (48519408).

Almost surely, 2^642386092 is an apocalyptic number.

642386092 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

642386092 is a deficient number, since it is larger than the sum of its proper divisors (522079700).

642386092 is a wasteful number, since it uses less digits than its factorization.

642386092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18009 (or 18007 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 642386092 is about 25345.3366913916. The cubic root of 642386092 is about 862.8435226725.

The spelling of 642386092 in words is "six hundred forty-two million, three hundred eighty-six thousand, ninety-two".