1608640 has 56 divisors (see below), whose sum is σ = 4187952. Its totient is φ = 583680.

The previous prime is 1608637. The next prime is 1608653. The reversal of 1608640 is 468061.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3292 + ... + 3748.

2^1608640 is an apocalyptic number.

1608640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1608640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2093976).

1608640 is an abundant number, since it is smaller than the sum of its proper divisors (2579312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1608640 is a wasteful number, since it uses less digits than its factorization.

1608640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1608640 is about 1268.3217257463. The cubic root of 1608640 is about 117.1708609857.

The spelling of 1608640 in words is "one million, six hundred eight thousand, six hundred forty".