249930720 has 288 divisors, whose sum is σ = 935625600. Its totient is φ = 60742656.

The previous prime is 249930713. The next prime is 249930727. The reversal of 249930720 is 27039942.

It is an interprime number because it is at equal distance from previous prime (249930713) and next prime (249930727).

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249930727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3163641 + ... + 3163719.

It is an arithmetic number, because the mean of its divisors is an integer number (3248700).

Almost surely, 2^249930720 is an apocalyptic number.

249930720 is a gapful number since it is divisible by the number (20) 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 249930720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467812800).

249930720 is an abundant number, since it is smaller than the sum of its proper divisors (685694880).

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

249930720 is a wasteful number, since it uses less digits than its factorization.

249930720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 249930720 is about 15809.1973230775. The cubic root of 249930720 is about 629.9023280177.

The spelling of 249930720 in words is "two hundred forty-nine million, nine hundred thirty thousand, seven hundred twenty".