1406643406 has 8 divisors (see below), whose sum is σ = 2411388720. Its totient is φ = 602847168.

The previous prime is 1406643389. The next prime is 1406643421. The reversal of 1406643406 is 6043466041.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50237251 + ... + 50237278.

It is an arithmetic number, because the mean of its divisors is an integer number (301423590).

Almost surely, 2^1406643406 is an apocalyptic number.

1406643406 is a deficient number, since it is larger than the sum of its proper divisors (1004745314).

1406643406 is a wasteful number, since it uses less digits than its factorization.

1406643406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100474538.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 1406643406 is about 37505.2450465265. The cubic root of 1406643406 is about 1120.4556516548.

The spelling of 1406643406 in words is "one billion, four hundred six million, six hundred forty-three thousand, four hundred six".