1684693944 has 64 divisors (see below), whose sum is σ = 4779302400. Its totient is φ = 549613152.

The previous prime is 1684693939. The next prime is 1684693951. The reversal of 1684693944 is 4493964861.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 72822 + ... + 93125.

It is an arithmetic number, because the mean of its divisors is an integer number (74676600).

Almost surely, 2^1684693944 is an apocalyptic number.

It is an amenable number.

1684693944 is an abundant number, since it is smaller than the sum of its proper divisors (3094608456).

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

1684693944 is a wasteful number, since it uses less digits than its factorization.

1684693944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166009 (or 165999 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 1684693944 is about 41045.0233767749. The cubic root of 1684693944 is about 1189.8905211997.

The spelling of 1684693944 in words is "one billion, six hundred eighty-four million, six hundred ninety-three thousand, nine hundred forty-four".