28887105 has 16 divisors (see below), whose sum is σ = 49775040. Its totient is φ = 14221248.

The previous prime is 28887101. The next prime is 28887137. The reversal of 28887105 is 50178882.

It is not a de Polignac number, because 28887105 - 2² = 28887101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (28887101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73875 + ... + 74264.

It is an arithmetic number, because the mean of its divisors is an integer number (3110940).

Almost surely, 2^28887105 is an apocalyptic number.

It is an amenable number.

28887105 is a deficient number, since it is larger than the sum of its proper divisors (20887935).

28887105 is a wasteful number, since it uses less digits than its factorization.

28887105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148160.

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 28887105 is about 5374.6725481651. The cubic root of 28887105 is about 306.8324868552.

The spelling of 28887105 in words is "twenty-eight million, eight hundred eighty-seven thousand, one hundred five".