28861058 has 4 divisors (see below), whose sum is σ = 43291590. Its totient is φ = 14430528.

The previous prime is 28861051. The next prime is 28861103. The reversal of 28861058 is 85016882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85016882 = 2 ⋅42508441.

It can be written as a sum of positive squares in only one way, i.e., 17280649 + 11580409 = 4157^2 + 3403^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28861051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7215263 + ... + 7215266.

Almost surely, 2^28861058 is an apocalyptic number.

28861058 is a deficient number, since it is larger than the sum of its proper divisors (14430532).

28861058 is a wasteful number, since it uses less digits than its factorization.

28861058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14430531.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 28861058 is about 5372.2488773325. The cubic root of 28861058 is about 306.7402372846.

The spelling of 28861058 in words is "twenty-eight million, eight hundred sixty-one thousand, fifty-eight".