638411 has 8 divisors (see below), whose sum is σ = 683424. Its totient is φ = 594880.

The previous prime is 638371. The next prime is 638423. The reversal of 638411 is 114836.

638411 = T₃₄ + T₃₅ + ... + T₁₅₆.

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

It is a cyclic number.

It is not a de Polignac number, because 638411 - 2⁶ = 638347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638431) 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 7 ways as a sum of consecutive naturals, for example, 605 + ... + 1281.

It is an arithmetic number, because the mean of its divisors is an integer number (85428).

2⁶³⁸⁴¹¹ is an apocalyptic number.

638411 is a deficient number, since it is larger than the sum of its proper divisors (45013).

638411 is a wasteful number, since it uses less digits than its factorization.

638411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741.

The product of its digits is 576, while the sum is 23.

The square root of 638411 is about 799.0062577978. The cubic root of 638411 is about 86.1060077293.

The spelling of 638411 in words is "six hundred thirty-eight thousand, four hundred eleven".