28353909 has 32 divisors (see below), whose sum is σ = 43632000. Its totient is φ = 16257024.

The previous prime is 28353881. The next prime is 28353911. The reversal of 28353909 is 90935382.

28353909 = T₂₄₇ + T₂₄₈ + ... + T₅₆₉.

It is not a de Polignac number, because 28353909 - 2⁹ = 28353397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28353979) 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 31 ways as a sum of consecutive naturals, for example, 27597 + ... + 28605.

It is an arithmetic number, because the mean of its divisors is an integer number (1363500).

Almost surely, 2^28353909 is an apocalyptic number.

28353909 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28353909 is a deficient number, since it is larger than the sum of its proper divisors (15278091).

28353909 is a wasteful number, since it uses less digits than its factorization.

28353909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 28353909 is about 5324.8388708016. The cubic root of 28353909 is about 304.9329208390.

The spelling of 28353909 in words is "twenty-eight million, three hundred fifty-three thousand, nine hundred nine".