1006405946 has 32 divisors (see below), whose sum is σ = 1955775360. Its totient is φ = 377182656.

The previous prime is 1006405909. The next prime is 1006405991. The reversal of 1006405946 is 6495046001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142061 + ... + 148976.

It is an arithmetic number, because the mean of its divisors is an integer number (61117980).

Almost surely, 2^1006405946 is an apocalyptic number.

1006405946 is a deficient number, since it is larger than the sum of its proper divisors (949369414).

1006405946 is a wasteful number, since it uses less digits than its factorization.

1006405946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291078.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1006405946 is about 31723.9018092037. The cubic root of 1006405946 is about 1002.1307719197.

It can be divided in two parts, 100 and 6405946, that added together give a palindrome (6406046).

The spelling of 1006405946 in words is "one billion, six million, four hundred five thousand, nine hundred forty-six".