28325649 has 16 divisors (see below), whose sum is σ = 41630400. Its totient is φ = 16988160.

The previous prime is 28325641. The next prime is 28325653. The reversal of 28325649 is 94652382.

It is a happy number.

It is not a de Polignac number, because 28325649 - 2³ = 28325641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28325641) 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 15 ways as a sum of consecutive naturals, for example, 1224 + ... + 7625.

It is an arithmetic number, because the mean of its divisors is an integer number (2601900).

Almost surely, 2^28325649 is an apocalyptic number.

It is an amenable number.

28325649 is a deficient number, since it is larger than the sum of its proper divisors (13304751).

28325649 is a wasteful number, since it uses less digits than its factorization.

28325649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8960.

The product of its digits is 103680, while the sum is 39.

The square root of 28325649 is about 5322.1846078467. The cubic root of 28325649 is about 304.8315795051.

The spelling of 28325649 in words is "twenty-eight million, three hundred twenty-five thousand, six hundred forty-nine".