649999284 has 96 divisors (see below), whose sum is σ = 1789433856. Its totient is φ = 181409280.

The previous prime is 649999279. The next prime is 649999321. The reversal of 649999284 is 482999946.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 102387 + ... + 108549.

It is an arithmetic number, because the mean of its divisors is an integer number (18639936).

Almost surely, 2^649999284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649999284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894716928).

649999284 is an abundant number, since it is smaller than the sum of its proper divisors (1139434572).

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

649999284 is a wasteful number, since it uses less digits than its factorization.

649999284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6245 (or 6243 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 60.

The square root of 649999284 is about 25495.0835260448. The cubic root of 649999284 is about 866.2387872756.

The spelling of 649999284 in words is "six hundred forty-nine million, nine hundred ninety-nine thousand, two hundred eighty-four".