28454972 has 24 divisors (see below), whose sum is σ = 61288416. Its totient is φ = 11256768.

The previous prime is 28454953. The next prime is 28454981. The reversal of 28454972 is 27945482.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38723 + ... + 39450.

It is an arithmetic number, because the mean of its divisors is an integer number (2553684).

Almost surely, 2^28454972 is an apocalyptic number.

It is an amenable number.

28454972 is an abundant number, since it is smaller than the sum of its proper divisors (32833444).

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

28454972 is a wasteful number, since it uses less digits than its factorization.

28454972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78197 (or 78195 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 28454972 is about 5334.3202003629. The cubic root of 28454972 is about 305.2947862112.

The spelling of 28454972 in words is "twenty-eight million, four hundred fifty-four thousand, nine hundred seventy-two".