28570049 has 4 divisors (see below), whose sum is σ = 28585860. Its totient is φ = 28554240.

The previous prime is 28570039. The next prime is 28570063. The reversal of 28570049 is 94007582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10660225 + 17909824 = 3265^2 + 4232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28570049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28570039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4784 + ... + 8945.

It is an arithmetic number, because the mean of its divisors is an integer number (7146465).

Almost surely, 2^28570049 is an apocalyptic number.

It is an amenable number.

28570049 is a deficient number, since it is larger than the sum of its proper divisors (15811).

28570049 is a wasteful number, since it uses less digits than its factorization.

28570049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15810.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28570049 is about 5345.0957896000. The cubic root of 28570049 is about 305.7057882398.

The spelling of 28570049 in words is "twenty-eight million, five hundred seventy thousand, forty-nine".