497840 has 60 divisors (see below), whose sum is σ = 1357056. Its totient is φ = 169344.

The previous prime is 497839. The next prime is 497851. The reversal of 497840 is 48794.

497840 = T₅₀ + T₅₁ + ... + T₁₄₅.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 497797 and 497806.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3857 + ... + 3983.

2⁴⁹⁷⁸⁴⁰ is an apocalyptic number.

497840 is a gapful number since it is divisible by the number (40) 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 497840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (678528).

497840 is an abundant number, since it is smaller than the sum of its proper divisors (859216).

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

497840 is a wasteful number, since it uses less digits than its factorization.

497840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 497840 is about 705.5777774278. The cubic root of 497840 is about 79.2555947448.

The spelling of 497840 in words is "four hundred ninety-seven thousand, eight hundred forty".