28284972 has 24 divisors (see below), whose sum is σ = 66316992. Its totient is φ = 9382800.

The previous prime is 28284961. The next prime is 28284973. The reversal of 28284972 is 27948282.

It is not an unprimeable number, because it can be changed into a prime (28284973) 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 7 ways as a sum of consecutive naturals, for example, 3054 + ... + 8117.

It is an arithmetic number, because the mean of its divisors is an integer number (2763208).

Almost surely, 2^28284972 is an apocalyptic number.

It is an amenable number.

28284972 is an abundant number, since it is smaller than the sum of its proper divisors (38032020).

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

28284972 is a wasteful number, since it uses less digits than its factorization.

28284972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11389 (or 11387 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 28284972 is about 5318.3617778410. The cubic root of 28284972 is about 304.6855919775.

The spelling of 28284972 in words is "twenty-eight million, two hundred eighty-four thousand, nine hundred seventy-two".