490788 has 18 divisors (see below), whose sum is σ = 1240694. Its totient is φ = 163584.

The previous prime is 490783. The next prime is 490829. The reversal of 490788 is 887094.

It can be written as a sum of positive squares in only one way, i.e., 451584 + 39204 = 672^2 + 198^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 13633 = 490788 / (4 + 9 + 0 + 7 + 8 + 8).

It is not an unprimeable number, because it can be changed into a prime (490783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6781 + ... + 6852.

2⁴⁹⁰⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

490788 is an abundant number, since it is smaller than the sum of its proper divisors (749906).

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

490788 is a wasteful number, since it uses less digits than its factorization.

490788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13643 (or 13638 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 490788 is about 700.5626310331. The cubic root of 490788 is about 78.8795901080.

The spelling of 490788 in words is "four hundred ninety thousand, seven hundred eighty-eight".