28554225 has 48 divisors (see below), whose sum is σ = 54484608. Its totient is φ = 12925440.

The previous prime is 28554223. The next prime is 28554257. The reversal of 28554225 is 52245582.

It is a happy number.

It is not a de Polignac number, because 28554225 - 2¹ = 28554223 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28554223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71727 + ... + 72123.

It is an arithmetic number, because the mean of its divisors is an integer number (1135096).

Almost surely, 2^28554225 is an apocalyptic number.

28554225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28554225 is a deficient number, since it is larger than the sum of its proper divisors (25930383).

28554225 is a wasteful number, since it uses less digits than its factorization.

28554225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 549 counting only the distinct ones).

The product of its digits is 32000, while the sum is 33.

The square root of 28554225 is about 5343.6153491807. The cubic root of 28554225 is about 305.6493377267.

The spelling of 28554225 in words is "twenty-eight million, five hundred fifty-four thousand, two hundred twenty-five".