1728934040 has 16 divisors (see below), whose sum is σ = 3890101680. Its totient is φ = 691573600.

The previous prime is 1728934033. The next prime is 1728934061. The reversal of 1728934040 is 404398271.

It is a junction number, because it is equal to n+sod(n) for n = 1728933985 and 1728934003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21611636 + ... + 21611715.

It is an arithmetic number, because the mean of its divisors is an integer number (243131355).

Almost surely, 2^1728934040 is an apocalyptic number.

1728934040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1728934040 is an abundant number, since it is smaller than the sum of its proper divisors (2161167640).

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

1728934040 is a wasteful number, since it uses less digits than its factorization.

1728934040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43223362 (or 43223358 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1728934040 is about 41580.4526189891. The cubic root of 1728934040 is about 1200.2161740180.

The spelling of 1728934040 in words is "one billion, seven hundred twenty-eight million, nine hundred thirty-four thousand, forty".