1673709920 has 48 divisors (see below), whose sum is σ = 3956653008. Its totient is φ = 669058560.

The previous prime is 1673709907. The next prime is 1673709929. The reversal of 1673709920 is 299073761.

It is a happy number.

It is a Cunningham number, because it is equal to 40911²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1673709929) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 407075 + ... + 411165.

It is an arithmetic number, because the mean of its divisors is an integer number (82430271).

Almost surely, 2^1673709920 is an apocalyptic number.

1673709920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1673709920 is an abundant number, since it is smaller than the sum of its proper divisors (2282943088).

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

1673709920 is a wasteful number, since it uses less digits than its factorization.

1673709920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6663 (or 6655 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 1673709920 is about 40910.9999877783. Note that the first 4 decimals coincide. The cubic root of 1673709920 is about 1187.2988944023.

The spelling of 1673709920 in words is "one billion, six hundred seventy-three million, seven hundred nine thousand, nine hundred twenty".