673555428 has 72 divisors (see below), whose sum is σ = 2095515968. Its totient is φ = 177640128.

The previous prime is 673555427. The next prime is 673555439. The reversal of 673555428 is 824555376.

673555428 is a `hidden beast` number, since 6 + 73 + 5 + 554 + 28 = 666.

It is not an unprimeable number, because it can be changed into a prime (673555427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99526 + ... + 106077.

Almost surely, 2^673555428 is an apocalyptic number.

It is an amenable number.

673555428 is an abundant number, since it is smaller than the sum of its proper divisors (1421960540).

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

673555428 is a wasteful number, since it uses less digits than its factorization.

673555428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205633 (or 205628 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 673555428 is about 25952.9464223236. The cubic root of 673555428 is about 876.5791035413.

The spelling of 673555428 in words is "six hundred seventy-three million, five hundred fifty-five thousand, four hundred twenty-eight".