1408671664 has 20 divisors (see below), whose sum is σ = 2729909104. Its totient is φ = 704179008.

The previous prime is 1408671623. The next prime is 1408671739. The reversal of 1408671664 is 4661768041.

It is a self number, because there is not a number n which added to its sum of digits gives 1408671664.

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, 105154 + ... + 117790.

Almost surely, 2^1408671664 is an apocalyptic number.

It is an amenable number.

1408671664 is a deficient number, since it is larger than the sum of its proper divisors (1321237440).

1408671664 is a wasteful number, since it uses less digits than its factorization.

1408671664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19612 (or 19606 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1408671664 is about 37532.2749643557. The cubic root of 1408671664 is about 1120.9939263682.

The spelling of 1408671664 in words is "one billion, four hundred eight million, six hundred seventy-one thousand, six hundred sixty-four".