28920284 has 6 divisors (see below), whose sum is σ = 50610504. Its totient is φ = 14460140.

The previous prime is 28920277. The next prime is 28920301. The reversal of 28920284 is 48202982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3615032 + ... + 3615039.

It is an arithmetic number, because the mean of its divisors is an integer number (8435084).

Almost surely, 2^28920284 is an apocalyptic number.

It is an amenable number.

28920284 is a deficient number, since it is larger than the sum of its proper divisors (21690220).

28920284 is a wasteful number, since it uses less digits than its factorization.

28920284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7230075 (or 7230073 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28920284 is about 5377.7582690188. The cubic root of 28920284 is about 306.9499152593.

The spelling of 28920284 in words is "twenty-eight million, nine hundred twenty thousand, two hundred eighty-four".