673221888 has 144 divisors (see below), whose sum is σ = 2005899840. Its totient is φ = 222713856.

The previous prime is 673221883. The next prime is 673221907. The reversal of 673221888 is 888122376.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673221883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1195495 + ... + 1196057.

It is an arithmetic number, because the mean of its divisors is an integer number (13929860).

Almost surely, 2^673221888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673221888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002949920).

673221888 is an abundant number, since it is smaller than the sum of its proper divisors (1332677952).

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

673221888 is a wasteful number, since it uses less digits than its factorization.

673221888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 741 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 673221888 is about 25946.5197666277. The cubic root of 673221888 is about 876.4343876769.

The spelling of 673221888 in words is "six hundred seventy-three million, two hundred twenty-one thousand, eight hundred eighty-eight".