405939604 has 72 divisors (see below), whose sum is σ = 866533248. Its totient is φ = 162676800.

The previous prime is 405939577. The next prime is 405939613. The reversal of 405939604 is 406939504.

It is a congruent number.

It is an unprimeable 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 23 ways as a sum of consecutive naturals, for example, 4019154 + ... + 4019254.

It is an arithmetic number, because the mean of its divisors is an integer number (12035184).

Almost surely, 2^405939604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405939604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433266624).

405939604 is an abundant number, since it is smaller than the sum of its proper divisors (460593644).

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

405939604 is a wasteful number, since it uses less digits than its factorization.

405939604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 405939604 is about 20147.9429222936. The cubic root of 405939604 is about 740.4353440305.

The spelling of 405939604 in words is "four hundred five million, nine hundred thirty-nine thousand, six hundred four".