250016640 has 128 divisors (see below), whose sum is σ = 802185120. Its totient is φ = 66232320.

The previous prime is 250016629. The next prime is 250016677. The reversal of 250016640 is 46610052.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 250016640.

It is a congruent number.

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, 377910 + ... + 378570.

Almost surely, 2^250016640 is an apocalyptic number.

250016640 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 250016640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401092560).

250016640 is an abundant number, since it is smaller than the sum of its proper divisors (552168480).

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

250016640 is a wasteful number, since it uses less digits than its factorization.

250016640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 250016640 is about 15811.9144950888. The cubic root of 250016640 is about 629.9745013615.

Adding to 250016640 its reverse (46610052), we get a palindrome (296626692).

The spelling of 250016640 in words is "two hundred fifty million, sixteen thousand, six hundred forty".