28258545 has 24 divisors (see below), whose sum is σ = 52596864. Its totient is φ = 12917856.

The previous prime is 28258543. The next prime is 28258583. The reversal of 28258545 is 54585282.

It is not a de Polignac number, because 28258545 - 2¹ = 28258543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28258541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18489 + ... + 19958.

It is an arithmetic number, because the mean of its divisors is an integer number (2191536).

Almost surely, 2^28258545 is an apocalyptic number.

It is an amenable number.

28258545 is a deficient number, since it is larger than the sum of its proper divisors (24338319).

28258545 is a wasteful number, since it uses less digits than its factorization.

28258545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38469 (or 38462 counting only the distinct ones).

The product of its digits is 128000, while the sum is 39.

The square root of 28258545 is about 5315.8766915721. The cubic root of 28258545 is about 304.5906719011.

The spelling of 28258545 in words is "twenty-eight million, two hundred fifty-eight thousand, five hundred forty-five".