649971460 has 48 divisors (see below), whose sum is σ = 1398862080. Its totient is φ = 253566720.

The previous prime is 649971433. The next prime is 649971479. The reversal of 649971460 is 64179946.

649971460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 649971460.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310096 + ... + 312184.

It is an arithmetic number, because the mean of its divisors is an integer number (29142960).

Almost surely, 2^649971460 is an apocalyptic number.

It is an amenable number.

649971460 is an abundant number, since it is smaller than the sum of its proper divisors (748890620).

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

649971460 is a wasteful number, since it uses less digits than its factorization.

649971460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476 (or 2474 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 649971460 is about 25494.5378463702. The cubic root of 649971460 is about 866.2264269686.

The spelling of 649971460 in words is "six hundred forty-nine million, nine hundred seventy-one thousand, four hundred sixty".