495640 has 16 divisors (see below), whose sum is σ = 1115280. Its totient is φ = 198240.

The previous prime is 495637. The next prime is 495647. The reversal of 495640 is 46594.

495640 = T₁₃₇ + T₁₃₈ + ... + T₁₇₆.

495640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 495599 and 495608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6156 + ... + 6235.

It is an arithmetic number, because the mean of its divisors is an integer number (69705).

2⁴⁹⁵⁶⁴⁰ is an apocalyptic number.

495640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

495640 is an abundant number, since it is smaller than the sum of its proper divisors (619640).

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

495640 is a wasteful number, since it uses less digits than its factorization.

495640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12402 (or 12398 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 495640 is about 704.0170452482. The cubic root of 495640 is about 79.1386764700.

The spelling of 495640 in words is "four hundred ninety-five thousand, six hundred forty".