250668638 has 16 divisors (see below), whose sum is σ = 434314224. Its totient is φ = 107237760.

The previous prime is 250668637. The next prime is 250668643. The reversal of 250668638 is 836866052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250668637) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 334745 + ... + 335492.

It is an arithmetic number, because the mean of its divisors is an integer number (27144639).

Almost surely, 2^250668638 is an apocalyptic number.

250668638 is a deficient number, since it is larger than the sum of its proper divisors (183645586).

250668638 is a wasteful number, since it uses less digits than its factorization.

250668638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670267.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 250668638 is about 15832.5183720089. The cubic root of 250668638 is about 630.5216457228.

The spelling of 250668638 in words is "two hundred fifty million, six hundred sixty-eight thousand, six hundred thirty-eight".