646289036 has 12 divisors (see below), whose sum is σ = 1141015512. Its totient is φ = 320284608.

The previous prime is 646288999. The next prime is 646289069. The reversal of 646289036 is 630982646.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 714470 + ... + 715373.

It is an arithmetic number, because the mean of its divisors is an integer number (95084626).

Almost surely, 2^646289036 is an apocalyptic number.

It is an amenable number.

646289036 is a deficient number, since it is larger than the sum of its proper divisors (494726476).

646289036 is a wasteful number, since it uses less digits than its factorization.

646289036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429960 (or 1429958 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 646289036 is about 25422.2154030682. The cubic root of 646289036 is about 864.5874544944.

The spelling of 646289036 in words is "six hundred forty-six million, two hundred eighty-nine thousand, thirty-six".