28894475 has 12 divisors (see below), whose sum is σ = 37937304. Its totient is φ = 21755520.

The previous prime is 28894471. The next prime is 28894501. The reversal of 28894475 is 57449882.

It is a happy number.

It is not a de Polignac number, because 28894475 - 2² = 28894471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28894471) 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 11 ways as a sum of consecutive naturals, for example, 33569 + ... + 34418.

It is an arithmetic number, because the mean of its divisors is an integer number (3161442).

Almost surely, 2^28894475 is an apocalyptic number.

28894475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28894475 is a deficient number, since it is larger than the sum of its proper divisors (9042829).

28894475 is a wasteful number, since it uses less digits than its factorization.

28894475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68014 (or 68009 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 28894475 is about 5375.3581276042. The cubic root of 28894475 is about 306.8585788103.

The spelling of 28894475 in words is "twenty-eight million, eight hundred ninety-four thousand, four hundred seventy-five".