638283853 has 16 divisors (see below), whose sum is σ = 715720320. Its totient is φ = 565664256.

The previous prime is 638283851. The next prime is 638283883. The reversal of 638283853 is 358382836.

It is not a de Polignac number, because 638283853 - 2¹ = 638283851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638283851) 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 in 15 ways as a sum of consecutive naturals, for example, 48025 + ... + 59857.

It is an arithmetic number, because the mean of its divisors is an integer number (44732520).

Almost surely, 2^638283853 is an apocalyptic number.

It is an amenable number.

638283853 is a deficient number, since it is larger than the sum of its proper divisors (77436467).

638283853 is a wasteful number, since it uses less digits than its factorization.

638283853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12036.

The product of its digits is 829440, while the sum is 46.

The square root of 638283853 is about 25264.2801797320. The cubic root of 638283853 is about 861.0029101105.

The spelling of 638283853 in words is "six hundred thirty-eight million, two hundred eighty-three thousand, eight hundred fifty-three".