646039748 has 24 divisors (see below), whose sum is σ = 1193992800. Its totient is φ = 305011008.

The previous prime is 646039727. The next prime is 646039787. The reversal of 646039748 is 847930646.

It is an unprimeable number.

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, 9488 + ... + 37176.

It is an arithmetic number, because the mean of its divisors is an integer number (49749700).

Almost surely, 2^646039748 is an apocalyptic number.

It is an amenable number.

646039748 is a deficient number, since it is larger than the sum of its proper divisors (547953052).

646039748 is a wasteful number, since it uses less digits than its factorization.

646039748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28019 (or 28017 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 646039748 is about 25417.3119743218. The cubic root of 646039748 is about 864.4762766865.

The spelling of 646039748 in words is "six hundred forty-six million, thirty-nine thousand, seven hundred forty-eight".