28770105 has 48 divisors (see below), whose sum is σ = 57685824. Its totient is φ = 12136320.

The previous prime is 28770097. The next prime is 28770113. The reversal of 28770105 is 50107782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28770097) and next prime (28770113).

It is not a de Polignac number, because 28770105 - 2³ = 28770097 is a prime.

It is a super-2 number, since 2×28770105² = 1655437883422050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8050 + ... + 11060.

It is an arithmetic number, because the mean of its divisors is an integer number (1201788).

Almost surely, 2^28770105 is an apocalyptic number.

It is an amenable number.

28770105 is an abundant number, since it is smaller than the sum of its proper divisors (28915719).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28770105 is a wasteful number, since it uses less digits than its factorization.

28770105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046 (or 3039 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 28770105 is about 5363.7771206492. Note that the first 3 decimals coincide. The cubic root of 28770105 is about 306.4176768849.

Adding to 28770105 its reverse (50107782), we get a palindrome (78877887).

The spelling of 28770105 in words is "twenty-eight million, seven hundred seventy thousand, one hundred five".