673221120 has 320 divisors, whose sum is σ = 2532587904. Its totient is φ = 150405120.

The previous prime is 673221103. The next prime is 673221137. The reversal of 673221120 is 21122376.

It is an interprime number because it is at equal distance from previous prime (673221103) and next prime (673221137).

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1097934 + ... + 1098546.

Almost surely, 2^673221120 is an apocalyptic number.

673221120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266293952).

673221120 is an abundant number, since it is smaller than the sum of its proper divisors (1859366784).

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

673221120 is a wasteful number, since it uses less digits than its factorization.

673221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 673221120 is about 25946.5049669508. The cubic root of 673221120 is about 876.4340544029.

Adding to 673221120 its reverse (21122376), we get a palindrome (694343496).

The spelling of 673221120 in words is "six hundred seventy-three million, two hundred twenty-one thousand, one hundred twenty".