406020442 has 8 divisors (see below), whose sum is σ = 610347456. Its totient is φ = 202571292.

The previous prime is 406020437. The next prime is 406020473. The reversal of 406020442 is 244020604.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 218308 + ... + 220159.

It is an arithmetic number, because the mean of its divisors is an integer number (76293432).

Almost surely, 2^406020442 is an apocalyptic number.

406020442 is a deficient number, since it is larger than the sum of its proper divisors (204327014).

406020442 is a wasteful number, since it uses less digits than its factorization.

406020442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438932.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 406020442 is about 20149.9489329378. The cubic root of 406020442 is about 740.4844903723.

The spelling of 406020442 in words is "four hundred six million, twenty thousand, four hundred forty-two".