1728307428 has 48 divisors (see below), whose sum is σ = 4163159616. Its totient is φ = 557706240.

The previous prime is 1728307421. The next prime is 1728307433. The reversal of 1728307428 is 8247038271.

It is a self number, because there is not a number n which added to its sum of digits gives 1728307428.

It is not an unprimeable number, because it can be changed into a prime (1728307421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43488 + ... + 73128.

It is an arithmetic number, because the mean of its divisors is an integer number (86732492).

Almost surely, 2^1728307428 is an apocalyptic number.

It is an amenable number.

1728307428 is an abundant number, since it is smaller than the sum of its proper divisors (2434852188).

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

1728307428 is a wasteful number, since it uses less digits than its factorization.

1728307428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29804 (or 29802 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 1728307428 is about 41572.9170013363. The cubic root of 1728307428 is about 1200.0711596691.

The spelling of 1728307428 in words is "one billion, seven hundred twenty-eight million, three hundred seven thousand, four hundred twenty-eight".