1673573220 has 144 divisors (see below), whose sum is σ = 5563696320. Its totient is φ = 403833600.

The previous prime is 1673573191. The next prime is 1673573249. The reversal of 1673573220 is 223753761.

1673573220 is a `hidden beast` number, since 1 + 67 + 3 + 573 + 2 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1673573191) and next prime (1673573249).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 451575 + ... + 455265.

It is an arithmetic number, because the mean of its divisors is an integer number (38636780).

Almost surely, 2^1673573220 is an apocalyptic number.

1673573220 is a gapful number since it is divisible by the number (10) 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 1673573220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2781848160).

1673573220 is an abundant number, since it is smaller than the sum of its proper divisors (3890123100).

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

1673573220 is a wasteful number, since it uses less digits than its factorization.

1673573220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3946 (or 3941 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 1673573220 is about 40909.3292538511. The cubic root of 1673573220 is about 1187.2665693707.

The spelling of 1673573220 in words is "one billion, six hundred seventy-three million, five hundred seventy-three thousand, two hundred twenty".