415640 has 16 divisors (see below), whose sum is σ = 935280. Its totient is φ = 166240.

The previous prime is 415631. The next prime is 415643. The reversal of 415640 is 46514.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 415640.

It is not an unprimeable number, because it can be changed into a prime (415643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5156 + ... + 5235.

It is an arithmetic number, because the mean of its divisors is an integer number (58455).

2⁴¹⁵⁶⁴⁰ is an apocalyptic number.

415640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

415640 is an abundant number, since it is smaller than the sum of its proper divisors (519640).

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

415640 is a wasteful number, since it uses less digits than its factorization.

415640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10402 (or 10398 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 415640 is about 644.7014813074. The cubic root of 415640 is about 74.6286832035.

The spelling of 415640 in words is "four hundred fifteen thousand, six hundred forty".