28458105 has 32 divisors (see below), whose sum is σ = 51623040. Its totient is φ = 13271040.

The previous prime is 28458103. The next prime is 28458113. The reversal of 28458105 is 50185482.

It is not a de Polignac number, because 28458105 - 2¹ = 28458103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28458103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (1613220).

Almost surely, 2^28458105 is an apocalyptic number.

It is an amenable number.

28458105 is a deficient number, since it is larger than the sum of its proper divisors (23164935).

28458105 is a wasteful number, since it uses less digits than its factorization.

28458105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7721.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 28458105 is about 5334.6138566910. The cubic root of 28458105 is about 305.3059905034.

The spelling of 28458105 in words is "twenty-eight million, four hundred fifty-eight thousand, one hundred five".