28990284 has 24 divisors (see below), whose sum is σ = 67866288. Its totient is φ = 9631680.

The previous prime is 28990267. The next prime is 28990289. The reversal of 28990284 is 48209982.

It is not an unprimeable number, because it can be changed into a prime (28990289) 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, 7 + ... + 7614.

It is an arithmetic number, because the mean of its divisors is an integer number (2827762).

Almost surely, 2^28990284 is an apocalyptic number.

It is an amenable number.

28990284 is an abundant number, since it is smaller than the sum of its proper divisors (38876004).

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

28990284 is a wasteful number, since it uses less digits than its factorization.

28990284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7945 (or 7943 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 28990284 is about 5384.2626236097. The cubic root of 28990284 is about 307.1973676668.

The spelling of 28990284 in words is "twenty-eight million, nine hundred ninety thousand, two hundred eighty-four".