42705028 has 6 divisors (see below), whose sum is σ = 74733806. Its totient is φ = 21352512.

The previous prime is 42705017. The next prime is 42705029. The reversal of 42705028 is 82050724.

It can be written as a sum of positive squares in only one way, i.e., 23503104 + 19201924 = 4848^2 + 4382^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42704987 and 42705005.

It is not an unprimeable number, because it can be changed into a prime (42705029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5338125 + ... + 5338132.

Almost surely, 2^42705028 is an apocalyptic number.

It is an amenable number.

42705028 is a deficient number, since it is larger than the sum of its proper divisors (32028778).

42705028 is a wasteful number, since it uses less digits than its factorization.

42705028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10676261 (or 10676259 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 42705028 is about 6534.9084155786. The cubic root of 42705028 is about 349.5368786227.

The spelling of 42705028 in words is "forty-two million, seven hundred five thousand, twenty-eight".