28490012 has 12 divisors (see below), whose sum is σ = 50299536. Its totient is φ = 14118720.

The previous prime is 28490009. The next prime is 28490017. The reversal of 28490012 is 21009482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28490017) 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, 31064 + ... + 31967.

It is an arithmetic number, because the mean of its divisors is an integer number (4191628).

Almost surely, 2^28490012 is an apocalyptic number.

It is an amenable number.

28490012 is a deficient number, since it is larger than the sum of its proper divisors (21809524).

28490012 is a wasteful number, since it uses less digits than its factorization.

28490012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63148 (or 63146 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 28490012 is about 5337.6035821331. The cubic root of 28490012 is about 305.4200500990.

Adding to 28490012 its reverse (21009482), we get a palindrome (49499494).

The spelling of 28490012 in words is "twenty-eight million, four hundred ninety thousand, twelve".