645834348 has 18 divisors (see below), whose sum is σ = 1632525804. Its totient is φ = 215278104.

The previous prime is 645834347. The next prime is 645834353. The reversal of 645834348 is 843438546.

645834348 is a `hidden beast` number, since 64 + 583 + 4 + 3 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (645834347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8969886 + ... + 8969957.

It is an arithmetic number, because the mean of its divisors is an integer number (90695878).

Almost surely, 2^645834348 is an apocalyptic number.

It is an amenable number.

645834348 is an abundant number, since it is smaller than the sum of its proper divisors (986691456).

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

645834348 is a wasteful number, since it uses less digits than its factorization.

645834348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17939853 (or 17939848 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 45.

The square root of 645834348 is about 25413.2710999588. The cubic root of 645834348 is about 864.3846506170.

The spelling of 645834348 in words is "six hundred forty-five million, eight hundred thirty-four thousand, three hundred forty-eight".