28896551 has 4 divisors (see below), whose sum is σ = 29043432. Its totient is φ = 28749672.

The previous prime is 28896521. The next prime is 28896577. The reversal of 28896551 is 15569882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15569882 = 2 ⋅7784941.

It is a cyclic number.

It is not a de Polignac number, because 28896551 - 2¹⁴ = 28880167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28896521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73145 + ... + 73538.

It is an arithmetic number, because the mean of its divisors is an integer number (7260858).

Almost surely, 2^28896551 is an apocalyptic number.

28896551 is a deficient number, since it is larger than the sum of its proper divisors (146881).

28896551 is a wasteful number, since it uses less digits than its factorization.

28896551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146880.

The product of its digits is 172800, while the sum is 44.

The square root of 28896551 is about 5375.5512275487. The cubic root of 28896551 is about 306.8659276564.

The spelling of 28896551 in words is "twenty-eight million, eight hundred ninety-six thousand, five hundred fifty-one".