405408004 has 6 divisors (see below), whose sum is σ = 709464014. Its totient is φ = 202704000.

The previous prime is 405407983. The next prime is 405408007. The reversal of 405408004 is 400804504.

It can be written as a sum of positive squares in only one way, i.e., 322561600 + 82846404 = 17960^2 + 9102^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 405408004.

It is not an unprimeable number, because it can be changed into a prime (405408007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50675997 + ... + 50676004.

Almost surely, 2^405408004 is an apocalyptic number.

It is an amenable number.

405408004 is a deficient number, since it is larger than the sum of its proper divisors (304056010).

405408004 is a wasteful number, since it uses less digits than its factorization.

405408004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101352005 (or 101352003 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 405408004 is about 20134.7461866297. The cubic root of 405408004 is about 740.1119893817. Note that the first 3 decimals are identical.

The spelling of 405408004 in words is "four hundred five million, four hundred eight thousand, four".