1684377894 has 8 divisors (see below), whose sum is σ = 3368755800. Its totient is φ = 561459296.

The previous prime is 1684377889. The next prime is 1684377917. The reversal of 1684377894 is 4987734861.

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

1684377894 is an admirable number.

It is a congruent number.

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, 140364819 + ... + 140364830.

It is an arithmetic number, because the mean of its divisors is an integer number (421094475).

Almost surely, 2^1684377894 is an apocalyptic number.

1684377894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1684377894 is a wasteful number, since it uses less digits than its factorization.

1684377894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280729654.

The product of its digits is 8128512, while the sum is 57.

The square root of 1684377894 is about 41041.1731557469. The cubic root of 1684377894 is about 1189.8161083922.

The spelling of 1684377894 in words is "one billion, six hundred eighty-four million, three hundred seventy-seven thousand, eight hundred ninety-four".