405545642 has 32 divisors (see below), whose sum is σ = 662390784. Its totient is φ = 185472000.

The previous prime is 405545611. The next prime is 405545653. The reversal of 405545642 is 246545504.

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 15 ways as a sum of consecutive naturals, for example, 351767 + ... + 352917.

It is an arithmetic number, because the mean of its divisors is an integer number (20699712).

Almost surely, 2^405545642 is an apocalyptic number.

405545642 is a deficient number, since it is larger than the sum of its proper divisors (256845142).

405545642 is a wasteful number, since it uses less digits than its factorization.

405545642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454.

The product of its (nonzero) digits is 96000, while the sum is 35.

The square root of 405545642 is about 20138.1638189781. The cubic root of 405545642 is about 740.1957371181.

The spelling of 405545642 in words is "four hundred five million, five hundred forty-five thousand, six hundred forty-two".