497640 has 128 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 107520.

The previous prime is 497633. The next prime is 497659. The reversal of 497640 is 46794.

497640 = T₁ + T₂ + ... + T₁₄₃.

497640 is a nontrivial binomial coefficient, being equal to C(145, 3).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 497598 and 497607.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 145 × 143 × 24.

It is a congruent number.

It is an unprimeable number.

497640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is the 143-rd tetrahedral number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17146 + ... + 17174.

It is an arithmetic number, because the mean of its divisors is an integer number (14175).

2⁴⁹⁷⁶⁴⁰ is an apocalyptic number.

497640 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 497640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907200).

497640 is an abundant number, since it is smaller than the sum of its proper divisors (1316760).

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

497640 is a wasteful number, since it uses less digits than its factorization.

497640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 497640 is about 705.4360353710. The cubic root of 497640 is about 79.2449800613.

The spelling of 497640 in words is "four hundred ninety-seven thousand, six hundred forty".