42179728 has 10 divisors (see below), whose sum is σ = 81723254. Its totient is φ = 21089856.

The previous prime is 42179719. The next prime is 42179743. The reversal of 42179728 is 82797124.

It can be written as a sum of positive squares in only one way, i.e., 38539264 + 3640464 = 6208^2 + 1908^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318101 + ... + 1318132.

Almost surely, 2^42179728 is an apocalyptic number.

It is an amenable number.

42179728 is a deficient number, since it is larger than the sum of its proper divisors (39543526).

42179728 is a wasteful number, since it uses less digits than its factorization.

42179728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636241 (or 2636235 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 42179728 is about 6494.5922119868. The cubic root of 42179728 is about 348.0977837690.

The spelling of 42179728 in words is "forty-two million, one hundred seventy-nine thousand, seven hundred twenty-eight".