28658355 has 16 divisors (see below), whose sum is σ = 50022144. Its totient is φ = 13894880.

The previous prime is 28658317. The next prime is 28658381. The reversal of 28658355 is 55385682.

It is not a de Polignac number, because 28658355 - 2¹⁰ = 28657331 is a prime.

It is a super-2 number, since 2×28658355² = 1642602622612050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86679 + ... + 87008.

It is an arithmetic number, because the mean of its divisors is an integer number (3126384).

Almost surely, 2^28658355 is an apocalyptic number.

28658355 is a deficient number, since it is larger than the sum of its proper divisors (21363789).

28658355 is a wasteful number, since it uses less digits than its factorization.

28658355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173706.

The product of its digits is 288000, while the sum is 42.

The square root of 28658355 is about 5353.3498858192. The cubic root of 28658355 is about 306.0204288126.

The spelling of 28658355 in words is "twenty-eight million, six hundred fifty-eight thousand, three hundred fifty-five".