28454451 has 16 divisors (see below), whose sum is σ = 39409440. Its totient is φ = 18247680.

The previous prime is 28454449. The next prime is 28454479. The reversal of 28454451 is 15445482.

It is a happy number.

It is not a de Polignac number, because 28454451 - 2¹ = 28454449 is a prime.

It is a super-2 number, since 2×28454451² = 1619311563422802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28454441) 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 15 ways as a sum of consecutive naturals, for example, 7395 + ... + 10563.

It is an arithmetic number, because the mean of its divisors is an integer number (2463090).

Almost surely, 2^28454451 is an apocalyptic number.

28454451 is a deficient number, since it is larger than the sum of its proper divisors (10954989).

28454451 is a wasteful number, since it uses less digits than its factorization.

28454451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286.

The product of its digits is 25600, while the sum is 33.

The square root of 28454451 is about 5334.2713654256. The cubic root of 28454451 is about 305.2929229216.

The spelling of 28454451 in words is "twenty-eight million, four hundred fifty-four thousand, four hundred fifty-one".