28454225 has 24 divisors (see below), whose sum is σ = 36426240. Its totient is φ = 22040000.

The previous prime is 28454213. The next prime is 28454227. The reversal of 28454225 is 52245482.

It is not a de Polignac number, because 28454225 - 2⁶ = 28454161 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28454191 and 28454200.

It is not an unprimeable number, because it can be changed into a prime (28454227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148880 + ... + 149070.

It is an arithmetic number, because the mean of its divisors is an integer number (1517760).

Almost surely, 2^28454225 is an apocalyptic number.

28454225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28454225 is a deficient number, since it is larger than the sum of its proper divisors (7972015).

28454225 is a wasteful number, since it uses less digits than its factorization.

28454225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 356 counting only the distinct ones).

The product of its digits is 25600, while the sum is 32.

The square root of 28454225 is about 5334.2501816094. The cubic root of 28454225 is about 305.2921146546.

The spelling of 28454225 in words is "twenty-eight million, four hundred fifty-four thousand, two hundred twenty-five".