28045057 has 8 divisors (see below), whose sum is σ = 28576800. Its totient is φ = 27518304.

The previous prime is 28045051. The next prime is 28045091. The reversal of 28045057 is 75054082.

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 28045057 - 2¹⁹ = 27520769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28045051) 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, 11238 + ... + 13504.

It is an arithmetic number, because the mean of its divisors is an integer number (3572100).

Almost surely, 2^28045057 is an apocalyptic number.

It is an amenable number.

28045057 is a deficient number, since it is larger than the sum of its proper divisors (531743).

28045057 is a wasteful number, since it uses less digits than its factorization.

28045057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 28045057 is about 5295.7583970570. The cubic root of 28045057 is about 303.8216903611.

The spelling of 28045057 in words is "twenty-eight million, forty-five thousand, fifty-seven".