649212192 has 96 divisors (see below), whose sum is σ = 1898769600. Its totient is φ = 215806464.

The previous prime is 649212181. The next prime is 649212209. The reversal of 649212192 is 291212946.

649212192 is a `hidden beast` number, since 649 + 2 + 1 + 2 + 1 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

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 15 ways as a sum of consecutive naturals, for example, 402684 + ... + 404292.

It is an arithmetic number, because the mean of its divisors is an integer number (19778850).

Almost surely, 2^649212192 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 649212192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949384800).

649212192 is an abundant number, since it is smaller than the sum of its proper divisors (1249557408).

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

649212192 is a wasteful number, since it uses less digits than its factorization.

649212192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095 (or 2081 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 649212192 is about 25479.6426976518. The cubic root of 649212192 is about 865.8889997063. Note that the first 3 decimals are identical.

The spelling of 649212192 in words is "six hundred forty-nine million, two hundred twelve thousand, one hundred ninety-two".