28891095 has 16 divisors (see below), whose sum is σ = 47099232. Its totient is φ = 15117440.

The previous prime is 28891087. The next prime is 28891099. The reversal of 28891095 is 59019882.

It is a happy number.

It is not a de Polignac number, because 28891095 - 2³ = 28891087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28891099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17376 + ... + 18965.

It is an arithmetic number, because the mean of its divisors is an integer number (2943702).

Almost surely, 2^28891095 is an apocalyptic number.

28891095 is a deficient number, since it is larger than the sum of its proper divisors (18208137).

28891095 is a wasteful number, since it uses less digits than its factorization.

28891095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36402.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 28891095 is about 5375.0437207524. The cubic root of 28891095 is about 306.8466131728.

The spelling of 28891095 in words is "twenty-eight million, eight hundred ninety-one thousand, ninety-five".