1305673428 has 12 divisors (see below), whose sum is σ = 3046571360. Its totient is φ = 435224472.

The previous prime is 1305673417. The next prime is 1305673433. The reversal of 1305673428 is 8243765031.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54403048 + ... + 54403071.

Almost surely, 2^1305673428 is an apocalyptic number.

It is an amenable number.

1305673428 is an abundant number, since it is smaller than the sum of its proper divisors (1740897932).

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

1305673428 is a wasteful number, since it uses less digits than its factorization.

1305673428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108806126 (or 108806124 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 1305673428 is about 36134.1033927784. The cubic root of 1305673428 is about 1092.9782556633.

The spelling of 1305673428 in words is "one billion, three hundred five million, six hundred seventy-three thousand, four hundred twenty-eight".