5621638 has 32 divisors (see below), whose sum is σ = 9642240. Its totient is φ = 2436000.

The previous prime is 5621617. The next prime is 5621653. The reversal of 5621638 is 8361265.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79143 + ... + 79213.

It is an arithmetic number, because the mean of its divisors is an integer number (301320).

Almost surely, 2^5621638 is an apocalyptic number.

5621638 is a deficient number, since it is larger than the sum of its proper divisors (4020602).

5621638 is a wasteful number, since it uses less digits than its factorization.

5621638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204.

The product of its digits is 8640, while the sum is 31.

The square root of 5621638 is about 2370.9993673555. Note that the first 3 decimals coincide. The cubic root of 5621638 is about 177.8092262363.

The spelling of 5621638 in words is "five million, six hundred twenty-one thousand, six hundred thirty-eight".