28985278 has 16 divisors (see below), whose sum is σ = 50901984. Its totient is φ = 12119040.

The previous prime is 28985273. The next prime is 28985303. The reversal of 28985278 is 87258982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28985273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24675 + ... + 25822.

It is an arithmetic number, because the mean of its divisors is an integer number (3181374).

Almost surely, 2^28985278 is an apocalyptic number.

28985278 is a deficient number, since it is larger than the sum of its proper divisors (21916706).

28985278 is a wasteful number, since it uses less digits than its factorization.

28985278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50547.

The product of its digits is 645120, while the sum is 49.

The square root of 28985278 is about 5383.7977302272. The cubic root of 28985278 is about 307.1796845176.

The spelling of 28985278 in words is "twenty-eight million, nine hundred eighty-five thousand, two hundred seventy-eight".