649186992 has 30 divisors (see below), whose sum is σ = 1816822332. Its totient is φ = 216395616.

The previous prime is 649186991. The next prime is 649187017. The reversal of 649186992 is 299681946.

649186992 is a `hidden beast` number, since 6 + 491 + 8 + 69 + 92 = 666.

649186992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (649186991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2253978 + ... + 2254265.

Almost surely, 2^649186992 is an apocalyptic number.

It is an amenable number.

649186992 is an abundant number, since it is smaller than the sum of its proper divisors (1167635340).

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

649186992 is a wasteful number, since it uses less digits than its factorization.

649186992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508257 (or 4508248 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 649186992 is about 25479.1481804239. The cubic root of 649186992 is about 865.8777960324.

The spelling of 649186992 in words is "six hundred forty-nine million, one hundred eighty-six thousand, nine hundred ninety-two".