1673620720 has 20 divisors (see below), whose sum is σ = 3891168360. Its totient is φ = 669448256.

The previous prime is 1673620717. The next prime is 1673620747. The reversal of 1673620720 is 270263761.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10460050 + ... + 10460209.

It is an arithmetic number, because the mean of its divisors is an integer number (194558418).

Almost surely, 2^1673620720 is an apocalyptic number.

1673620720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1673620720 is an abundant number, since it is smaller than the sum of its proper divisors (2217547640).

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

1673620720 is a wasteful number, since it uses less digits than its factorization.

1673620720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20920272 (or 20920266 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 1673620720 is about 40909.9098019050. The cubic root of 1673620720 is about 1187.2778017502.

The spelling of 1673620720 in words is "one billion, six hundred seventy-three million, six hundred twenty thousand, seven hundred twenty".