638011 has 8 divisors (see below), whose sum is σ = 718848. Its totient is φ = 561000.

The previous prime is 637939. The next prime is 638023. The reversal of 638011 is 110836.

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

It is not a de Polignac number, because 638011 - 2⁷ = 637883 is a prime.

It is a super-2 number, since 2×638011² = 814116072242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 638011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595 + ... + 1276.

It is an arithmetic number, because the mean of its divisors is an integer number (89856).

2⁶³⁸⁰¹¹ is an apocalyptic number.

638011 is a deficient number, since it is larger than the sum of its proper divisors (80837).

638011 is a wasteful number, since it uses less digits than its factorization.

638011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 638011 is about 798.7559076464. The cubic root of 638011 is about 86.0880205711.

Adding to 638011 its reverse (110836), we get a palindrome (748847).

The spelling of 638011 in words is "six hundred thirty-eight thousand, eleven".