406236040 has 64 divisors (see below), whose sum is σ = 1066867200. Its totient is φ = 136313088.

The previous prime is 406236037. The next prime is 406236049. The reversal of 406236040 is 40632604.

It is a junction number, because it is equal to n+sod(n) for n = 406235996 and 406236014.

It is not an unprimeable number, because it can be changed into a prime (406236049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2275 + ... + 28594.

It is an arithmetic number, because the mean of its divisors is an integer number (16669800).

Almost surely, 2^406236040 is an apocalyptic number.

406236040 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 406236040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533433600).

406236040 is an abundant number, since it is smaller than the sum of its proper divisors (660631160).

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

406236040 is a wasteful number, since it uses less digits than its factorization.

406236040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30934 (or 30930 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 406236040 is about 20155.2980627923. The cubic root of 406236040 is about 740.6155336313.

Adding to 406236040 its reverse (40632604), we get a palindrome (446868644).

The spelling of 406236040 in words is "four hundred six million, two hundred thirty-six thousand, forty".