1673653420 has 96 divisors (see below), whose sum is σ = 3809304576. Its totient is φ = 615859200.

The previous prime is 1673653391. The next prime is 1673653463. The reversal of 1673653420 is 243563761.

It is a super-2 number, since 2×1673653420² = 5602231540555392800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1673653420.

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, 3436417 + ... + 3436903.

It is an arithmetic number, because the mean of its divisors is an integer number (39680256).

Almost surely, 2^1673653420 is an apocalyptic number.

1673653420 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 1673653420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904652288).

1673653420 is an abundant number, since it is smaller than the sum of its proper divisors (2135651156).

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

1673653420 is a wasteful number, since it uses less digits than its factorization.

1673653420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 1673653420 is about 40910.3094586194. The cubic root of 1673653420 is about 1187.2855342332.

The spelling of 1673653420 in words is "one billion, six hundred seventy-three million, six hundred fifty-three thousand, four hundred twenty".