1608638 has 8 divisors (see below), whose sum is σ = 2435832. Its totient is φ = 796696.

The previous prime is 1608637. The next prime is 1608653. The reversal of 1608638 is 8368061.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3545 + ... + 3972.

It is an arithmetic number, because the mean of its divisors is an integer number (304479).

2^1608638 is an apocalyptic number.

1608638 is a deficient number, since it is larger than the sum of its proper divisors (827194).

1608638 is a wasteful number, since it uses less digits than its factorization.

1608638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7626.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1608638 is about 1268.3209373025. The cubic root of 1608638 is about 117.1708124268.

The spelling of 1608638 in words is "one million, six hundred eight thousand, six hundred thirty-eight".