28454472 has 24 divisors (see below), whose sum is σ = 77064390. Its totient is φ = 9484800.

The previous prime is 28454449. The next prime is 28454479. The reversal of 28454472 is 27445482.

It can be written as a sum of positive squares in only one way, i.e., 28451556 + 2916 = 5334^2 + 54^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28454479) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 197529 + ... + 197672.

Almost surely, 2^28454472 is an apocalyptic number.

It is an amenable number.

28454472 is an abundant number, since it is smaller than the sum of its proper divisors (48609918).

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

28454472 is a wasteful number, since it uses less digits than its factorization.

28454472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395213 (or 395206 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 28454472 is about 5334.2733338291. The cubic root of 28454472 is about 305.2929980259.

It can be divided in two parts, 284 and 54472, that added together give a square (54756 = 234²).

The spelling of 28454472 in words is "twenty-eight million, four hundred fifty-four thousand, four hundred seventy-two".