42728105 has 8 divisors (see below), whose sum is σ = 58598592. Its totient is φ = 29299248.

The previous prime is 42728087. The next prime is 42728117. The reversal of 42728105 is 50182724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42728105 - 2⁶ = 42728041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 610367 + ... + 610436.

It is an arithmetic number, because the mean of its divisors is an integer number (7324824).

Almost surely, 2^42728105 is an apocalyptic number.

It is an amenable number.

42728105 is a deficient number, since it is larger than the sum of its proper divisors (15870487).

42728105 is a wasteful number, since it uses less digits than its factorization.

42728105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220815.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 42728105 is about 6536.6738483727. The cubic root of 42728105 is about 349.5998283534.

The spelling of 42728105 in words is "forty-two million, seven hundred twenty-eight thousand, one hundred five".