28877045 has 4 divisors (see below), whose sum is σ = 34652460. Its totient is φ = 23101632.

The previous prime is 28877041. The next prime is 28877059. The reversal of 28877045 is 54077882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54077882 = 2 ⋅27038941.

It can be written as a sum of positive squares in 2 ways, for example, as 5121169 + 23755876 = 2263^2 + 4874^2 .

It is a cyclic number.

It is not a de Polignac number, because 28877045 - 2² = 28877041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28876993 and 28877011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2887700 + ... + 2887709.

It is an arithmetic number, because the mean of its divisors is an integer number (8663115).

Almost surely, 2^28877045 is an apocalyptic number.

It is an amenable number.

28877045 is a deficient number, since it is larger than the sum of its proper divisors (5775415).

28877045 is an equidigital number, since it uses as much as digits as its factorization.

28877045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775414.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 28877045 is about 5373.7365957032. The cubic root of 28877045 is about 306.7968643492.

The spelling of 28877045 in words is "twenty-eight million, eight hundred seventy-seven thousand, forty-five".