638233057 has 32 divisors (see below), whose sum is σ = 856445184. Its totient is φ = 460339200.

The previous prime is 638233033. The next prime is 638233061. The reversal of 638233057 is 750332836.

It is a cyclic number.

It is not a de Polignac number, because 638233057 - 2¹⁹ = 637708769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (638233097) 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 31 ways as a sum of consecutive naturals, for example, 75853 + ... + 83845.

It is an arithmetic number, because the mean of its divisors is an integer number (26763912).

Almost surely, 2^638233057 is an apocalyptic number.

It is an amenable number.

638233057 is a deficient number, since it is larger than the sum of its proper divisors (218212127).

638233057 is a wasteful number, since it uses less digits than its factorization.

638233057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8089.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 638233057 is about 25263.2748668893. The cubic root of 638233057 is about 860.9800693510.

The spelling of 638233057 in words is "six hundred thirty-eight million, two hundred thirty-three thousand, fifty-seven".