406040 has 16 divisors (see below), whose sum is σ = 913680. Its totient is φ = 162400.

The previous prime is 406037. The next prime is 406067. The reversal of 406040 is 40604.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 5036 + ... + 5115.

It is an arithmetic number, because the mean of its divisors is an integer number (57105).

2⁴⁰⁶⁰⁴⁰ is an apocalyptic number.

406040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

406040 is an abundant number, since it is smaller than the sum of its proper divisors (507640).

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

406040 is a wasteful number, since it uses less digits than its factorization.

406040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10162 (or 10158 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 406040 is about 637.2126803509. The cubic root of 406040 is about 74.0496379891.

Adding to 406040 its reverse (40604), we get a palindrome (446644).

The spelling of 406040 in words is "four hundred six thousand, forty".