42728115 has 8 divisors (see below), whose sum is σ = 68365008. Its totient is φ = 22788320.

The previous prime is 42728087. The next prime is 42728117. The reversal of 42728115 is 51182724.

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

It is not a de Polignac number, because 42728115 - 2⁵ = 42728083 is a prime.

It is a super-2 number, since 2×42728115² = 3651383622906450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42728117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1424256 + ... + 1424285.

It is an arithmetic number, because the mean of its divisors is an integer number (8545626).

Almost surely, 2^42728115 is an apocalyptic number.

42728115 is a deficient number, since it is larger than the sum of its proper divisors (25636893).

42728115 is a wasteful number, since it uses less digits than its factorization.

42728115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848549.

The product of its digits is 4480, while the sum is 30.

The square root of 42728115 is about 6536.6746132877. The cubic root of 42728115 is about 349.5998556266.

The spelling of 42728115 in words is "forty-two million, seven hundred twenty-eight thousand, one hundred fifteen".