250812990 has 128 divisors (see below), whose sum is σ = 694310400. Its totient is φ = 64385280.

The previous prime is 250812983. The next prime is 250813021. The reversal of 250812990 is 99218052.

It is a super-3 number, since 3×250812990³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1538649 + ... + 1538811.

It is an arithmetic number, because the mean of its divisors is an integer number (5424300).

Almost surely, 2^250812990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 250812990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347155200).

250812990 is an abundant number, since it is smaller than the sum of its proper divisors (443497410).

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

250812990 is a wasteful number, since it uses less digits than its factorization.

250812990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 250812990 is about 15837.0764347464. The cubic root of 250812990 is about 630.6426548707.

The spelling of 250812990 in words is "two hundred fifty million, eight hundred twelve thousand, nine hundred ninety".