417640 has 32 divisors (see below), whose sum is σ = 962280. Its totient is φ = 163072.

The previous prime is 417631. The next prime is 417643. The reversal of 417640 is 46714.

417640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 417316 + 324 = 646^2 + 18^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (417643) by changing a digit.

417640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 2022 + ... + 2218.

2⁴¹⁷⁶⁴⁰ is an apocalyptic number.

417640 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 417640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (481140).

417640 is an abundant number, since it is smaller than the sum of its proper divisors (544640).

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

417640 is a wasteful number, since it uses less digits than its factorization.

417640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 417640 is about 646.2507253381. The cubic root of 417640 is about 74.7481925567.

The spelling of 417640 in words is "four hundred seventeen thousand, six hundred forty".