28030057 has 8 divisors (see below), whose sum is σ = 31155840. Its totient is φ = 25000560.

The previous prime is 28030033. The next prime is 28030061. The reversal of 28030057 is 75003082.

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

It is a cyclic number.

It is not a de Polignac number, because 28030057 - 2⁷ = 28029929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28030007) 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, 23457 + ... + 24622.

It is an arithmetic number, because the mean of its divisors is an integer number (3894480).

Almost surely, 2^28030057 is an apocalyptic number.

It is an amenable number.

28030057 is a deficient number, since it is larger than the sum of its proper divisors (3125783).

28030057 is a wasteful number, since it uses less digits than its factorization.

28030057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48143.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 28030057 is about 5294.3419798876. The cubic root of 28030057 is about 303.7675139918.

The spelling of 28030057 in words is "twenty-eight million, thirty thousand, fifty-seven".