531649000 has 64 divisors (see below), whose sum is σ = 1265284800. Its totient is φ = 209032000.

The previous prime is 531648911. The next prime is 531649021. The reversal of 531649000 is 946135.

It is a self number, because there is not a number n which added to its sum of digits gives 531649000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54495 + ... + 63505.

It is an arithmetic number, because the mean of its divisors is an integer number (19770075).

Almost surely, 2^531649000 is an apocalyptic number.

531649000 is a gapful number since it is divisible by the number (50) 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 531649000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (632642400).

531649000 is an abundant number, since it is smaller than the sum of its proper divisors (733635800).

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

531649000 is a wasteful number, since it uses less digits than its factorization.

531649000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9091 (or 9077 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 531649000 is about 23057.5150439071. The cubic root of 531649000 is about 810.1056611643.

The spelling of 531649000 in words is "five hundred thirty-one million, six hundred forty-nine thousand".