663488 has 28 divisors (see below), whose sum is σ = 1505712. Its totient is φ = 284160.

The previous prime is 663463. The next prime is 663517. The reversal of 663488 is 884366.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×663488² = 880432652288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293 + ... + 1188.

663488 is a Friedman number, since it can be written as 8*(6*(6*4)^3-8), using all its digits and the basic arithmetic operations.

2⁶⁶³⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

663488 is an abundant number, since it is smaller than the sum of its proper divisors (842224).

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

663488 is a wasteful number, since it uses less digits than its factorization.

663488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500 (or 1490 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 663488 is about 814.5477272696. The cubic root of 663488 is about 87.2189841673.

The spelling of 663488 in words is "six hundred sixty-three thousand, four hundred eighty-eight".