649539000 has 352 divisors, whose sum is σ = 2487129840. Its totient is φ = 157464000.

The previous prime is 649538977. The next prime is 649539017. The reversal of 649539000 is 935946.

649539000 is a `hidden beast` number, since 649 + 5 + 3 + 9 + 0 + 0 + 0 = 666.

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

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 87 ways as a sum of consecutive naturals, for example, 59048995 + ... + 59049005.

Almost surely, 2^649539000 is an apocalyptic number.

649539000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649539000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1243564920).

649539000 is an abundant number, since it is smaller than the sum of its proper divisors (1837590840).

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

649539000 is an equidigital number, since it uses as much as digits as its factorization.

649539000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 649539000 is about 25486.0550105347. The cubic root of 649539000 is about 866.0342690989.

The spelling of 649539000 in words is "six hundred forty-nine million, five hundred thirty-nine thousand".