649174986 has 24 divisors (see below), whose sum is σ = 1458641184. Its totient is φ = 216391500.

The previous prime is 649174979. The next prime is 649174987. The reversal of 649174986 is 689471946.

649174986 is a `hidden beast` number, since 6 + 491 + 74 + 9 + 86 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (649174987) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 667390 + ... + 668361.

It is an arithmetic number, because the mean of its divisors is an integer number (60776716).

Almost surely, 2^649174986 is an apocalyptic number.

649174986 is an abundant number, since it is smaller than the sum of its proper divisors (809466198).

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

649174986 is a wasteful number, since it uses less digits than its factorization.

649174986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335768 (or 1335756 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 649174986 is about 25478.9125749118. The cubic root of 649174986 is about 865.8724581800.

The spelling of 649174986 in words is "six hundred forty-nine million, one hundred seventy-four thousand, nine hundred eighty-six".