28058555 has 16 divisors (see below), whose sum is σ = 39420864. Its totient is φ = 18769920.

The previous prime is 28058549. The next prime is 28058557. The reversal of 28058555 is 55585082.

It is not a de Polignac number, because 28058555 - 2¹² = 28054459 is a prime.

It is a super-4 number, since 4×28058555⁴ (a number of 31 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (28058557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8342 + ... + 11211.

It is an arithmetic number, because the mean of its divisors is an integer number (2463804).

Almost surely, 2^28058555 is an apocalyptic number.

28058555 is a deficient number, since it is larger than the sum of its proper divisors (11362309).

28058555 is a wasteful number, since it uses less digits than its factorization.

28058555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19606.

The product of its (nonzero) digits is 80000, while the sum is 38.

The square root of 28058555 is about 5297.0326598955. The cubic root of 28058555 is about 303.8704253595.

The spelling of 28058555 in words is "twenty-eight million, fifty-eight thousand, five hundred fifty-five".