638302023 has 6 divisors (see below), whose sum is σ = 921991824. Its totient is φ = 425534676.

The previous prime is 638301991. The next prime is 638302051. The reversal of 638302023 is 320203836.

638302023 is a `hidden beast` number, since 638 + 3 + 0 + 2 + 0 + 23 = 666.

It is not a de Polignac number, because 638302023 - 2⁵ = 638301991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638302523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35461215 + ... + 35461232.

It is an arithmetic number, because the mean of its divisors is an integer number (153665304).

Almost surely, 2^638302023 is an apocalyptic number.

638302023 is a deficient number, since it is larger than the sum of its proper divisors (283689801).

638302023 is a wasteful number, since it uses less digits than its factorization.

638302023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70922453 (or 70922450 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 638302023 is about 25264.6397757815. The cubic root of 638302023 is about 861.0110800777.

Adding to 638302023 its reverse (320203836), we get a palindrome (958505859).

The spelling of 638302023 in words is "six hundred thirty-eight million, three hundred two thousand, twenty-three".