638352027284 has 12 divisors (see below), whose sum is σ = 1182828756564. Its totient is φ = 300400953984.

The previous prime is 638352027283. The next prime is 638352027293. The reversal of 638352027284 is 482720253836.

638352027284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 437846890000 + 200505137284 = 661700^2 + 447778^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638352027283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4693764839 + ... + 4693764974.

It is an arithmetic number, because the mean of its divisors is an integer number (98569063047).

Almost surely, 2^638352027284 is an apocalyptic number.

It is an amenable number.

638352027284 is a deficient number, since it is larger than the sum of its proper divisors (544476729280).

638352027284 is a wasteful number, since it uses less digits than its factorization.

638352027284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9387529834 (or 9387529832 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 638352027284 in words is "six hundred thirty-eight billion, three hundred fifty-two million, twenty-seven thousand, two hundred eighty-four".