250240640 has 128 divisors (see below), whose sum is σ = 678585600. Its totient is φ = 87478272.

The previous prime is 250240633. The next prime is 250240651. The reversal of 250240640 is 46042052.

250240640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×250240640³ (a number of 26 digits) contains 333 as substring.

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, 157289 + ... + 158871.

It is an arithmetic number, because the mean of its divisors is an integer number (5301450).

Almost surely, 2^250240640 is an apocalyptic number.

250240640 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 250240640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339292800).

250240640 is an abundant number, since it is smaller than the sum of its proper divisors (428344960).

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

250240640 is a wasteful number, since it uses less digits than its factorization.

250240640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 1622 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 250240640 is about 15818.9961754847. The cubic root of 250240640 is about 630.1625850639.

Adding to 250240640 its reverse (46042052), we get a palindrome (296282692).

The spelling of 250240640 in words is "two hundred fifty million, two hundred forty thousand, six hundred forty".