9000638 has 4 divisors (see below), whose sum is σ = 13500960. Its totient is φ = 4500318.

The previous prime is 9000637. The next prime is 9000683. The reversal of 9000638 is 8360009.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×9000638² = 162022968814088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9000637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2250158 + ... + 2250161.

It is an arithmetic number, because the mean of its divisors is an integer number (3375240).

Almost surely, 2^9000638 is an apocalyptic number.

9000638 is a deficient number, since it is larger than the sum of its proper divisors (4500322).

9000638 is a wasteful number, since it uses less digits than its factorization.

9000638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500321.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 9000638 is about 3000.1063314489. The cubic root of 9000638 is about 208.0132973501.

The spelling of 9000638 in words is "nine million, six hundred thirty-eight", and thus it is an aban number.