646119028 has 12 divisors (see below), whose sum is σ = 1146634272. Its totient is φ = 318509240.

The previous prime is 646118969. The next prime is 646119029. The reversal of 646119028 is 820911646.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646119029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137250 + ... + 1137817.

It is an arithmetic number, because the mean of its divisors is an integer number (95552856).

Almost surely, 2^646119028 is an apocalyptic number.

It is an amenable number.

646119028 is a deficient number, since it is larger than the sum of its proper divisors (500515244).

646119028 is a wasteful number, since it uses less digits than its factorization.

646119028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275142 (or 2275140 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 646119028 is about 25418.8714934397. The cubic root of 646119028 is about 864.5116371918.

The spelling of 646119028 in words is "six hundred forty-six million, one hundred nineteen thousand, twenty-eight".