5618638 has 16 divisors (see below), whose sum is σ = 8743680. Its totient is φ = 2705976.

The previous prime is 5618633. The next prime is 5618671. The reversal of 5618638 is 8368165.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 5618597 and 5618606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5618633) 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, 6381 + ... + 7207.

It is an arithmetic number, because the mean of its divisors is an integer number (546480).

Almost surely, 2^5618638 is an apocalyptic number.

5618638 is a deficient number, since it is larger than the sum of its proper divisors (3125042).

5618638 is a wasteful number, since it uses less digits than its factorization.

5618638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951.

The product of its digits is 34560, while the sum is 37.

The square root of 5618638 is about 2370.3666383072. The cubic root of 5618638 is about 177.7775911746. Note that the first 3 decimals are identical.

The spelling of 5618638 in words is "five million, six hundred eighteen thousand, six hundred thirty-eight".