42801728 has 28 divisors (see below), whose sum is σ = 85344000. Its totient is φ = 21297792.

The previous prime is 42801697. The next prime is 42801739. The reversal of 42801728 is 82710824.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 42801694 and 42801703.

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, 12773 + ... + 15771.

It is an arithmetic number, because the mean of its divisors is an integer number (3048000).

Almost surely, 2^42801728 is an apocalyptic number.

It is an amenable number.

42801728 is a deficient number, since it is larger than the sum of its proper divisors (42542272).

42801728 is a wasteful number, since it uses less digits than its factorization.

42801728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234 (or 3224 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 42801728 is about 6542.3029584390. The cubic root of 42801728 is about 349.8005067224.

The spelling of 42801728 in words is "forty-two million, eight hundred one thousand, seven hundred twenty-eight".