1404605406 has 16 divisors (see below), whose sum is σ = 2874541824. Its totient is φ = 457313304.

The previous prime is 1404605357. The next prime is 1404605407. The reversal of 1404605406 is 6045064041.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404605407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2721846 + ... + 2722361.

It is an arithmetic number, because the mean of its divisors is an integer number (179658864).

Almost surely, 2^1404605406 is an apocalyptic number.

1404605406 is an abundant number, since it is smaller than the sum of its proper divisors (1469936418).

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

1404605406 is a wasteful number, since it uses less digits than its factorization.

1404605406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5444255.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1404605406 is about 37478.0656651327. The cubic root of 1404605406 is about 1119.9142701174.

Adding to 1404605406 its reverse (6045064041), we get a palindrome (7449669447).

The spelling of 1404605406 in words is "one billion, four hundred four million, six hundred five thousand, four hundred six".