250220640 has 192 divisors, whose sum is σ = 824838336. Its totient is φ = 63700992.

The previous prime is 250220639. The next prime is 250220647. The reversal of 250220640 is 46022052.

It is a super-2 number, since 2×250220640² = 125220737364019200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250220647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1296384 + ... + 1296576.

It is an arithmetic number, because the mean of its divisors is an integer number (4296033).

Almost surely, 2^250220640 is an apocalyptic number.

250220640 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 250220640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412419168).

250220640 is an abundant number, since it is smaller than the sum of its proper divisors (574617696).

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

250220640 is a wasteful number, since it uses less digits than its factorization.

250220640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 250220640 is about 15818.3640114899. The cubic root of 250220640 is about 630.1457964407.

Adding to 250220640 its reverse (46022052), we get a palindrome (296242692).

The spelling of 250220640 in words is "two hundred fifty million, two hundred twenty thousand, six hundred forty".