405726404 has 12 divisors (see below), whose sum is σ = 714787500. Its totient is φ = 201501408.

The previous prime is 405726379. The next prime is 405726413. The reversal of 405726404 is 404627504.

It can be written as a sum of positive squares in 2 ways, for example, as 196056004 + 209670400 = 14002^2 + 14480^2 .

It is a super-2 number, since 2×405726404² = 329227829805542432, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 339779 + ... + 340970.

It is an arithmetic number, because the mean of its divisors is an integer number (59565625).

Almost surely, 2^405726404 is an apocalyptic number.

It is an amenable number.

405726404 is a deficient number, since it is larger than the sum of its proper divisors (309061096).

405726404 is a wasteful number, since it uses less digits than its factorization.

405726404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680902 (or 680900 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 405726404 is about 20142.6513647037. The cubic root of 405726404 is about 740.3056954669.

The spelling of 405726404 in words is "four hundred five million, seven hundred twenty-six thousand, four hundred four".