406501642 has 16 divisors (see below), whose sum is σ = 631803240. Its totient is φ = 195923392.

The previous prime is 406501631. The next prime is 406501643. The reversal of 406501642 is 246105604.

It can be written as a sum of positive squares in 4 ways, for example, as 209351961 + 197149681 = 14469^2 + 14041^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 406501642.

It is not an unprimeable number, because it can be changed into a prime (406501643) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 32508 + ... + 43240.

Almost surely, 2^406501642 is an apocalyptic number.

406501642 is a deficient number, since it is larger than the sum of its proper divisors (225301598).

406501642 is a wasteful number, since it uses less digits than its factorization.

406501642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11417.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 406501642 is about 20161.8858740942. The cubic root of 406501642 is about 740.7769062431.

The spelling of 406501642 in words is "four hundred six million, five hundred one thousand, six hundred forty-two".