638094602 has 8 divisors (see below), whose sum is σ = 957379716. Its totient is φ = 318968032.

The previous prime is 638094601. The next prime is 638094619. The reversal of 638094602 is 206490836.

It can be written as a sum of positive squares in 2 ways, for example, as 555120721 + 82973881 = 23561^2 + 9109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×638094602² = 814329442203076808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (638094601) 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, 29003 + ... + 46014.

Almost surely, 2^638094602 is an apocalyptic number.

638094602 is a deficient number, since it is larger than the sum of its proper divisors (319285114).

638094602 is a wasteful number, since it uses less digits than its factorization.

638094602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79272.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 638094602 is about 25260.5344757390. The cubic root of 638094602 is about 860.9178059843.

The spelling of 638094602 in words is "six hundred thirty-eight million, ninety-four thousand, six hundred two".