649143800 has 48 divisors (see below), whose sum is σ = 1513630800. Its totient is φ = 258905600.

The previous prime is 649143791. The next prime is 649143809. The reversal of 649143800 is 8341946.

649143800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (649143791) and next prime (649143809).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649143809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67280 + ... + 76320.

It is an arithmetic number, because the mean of its divisors is an integer number (31533975).

Almost surely, 2^649143800 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 649143800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (756815400).

649143800 is an abundant number, since it is smaller than the sum of its proper divisors (864487000).

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

649143800 is a wasteful number, since it uses less digits than its factorization.

649143800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9416 (or 9407 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 649143800 is about 25478.3005712704. The cubic root of 649143800 is about 865.8585926166.

The spelling of 649143800 in words is "six hundred forty-nine million, one hundred forty-three thousand, eight hundred".