28037009 has 32 divisors (see below), whose sum is σ = 38712576. Its totient is φ = 19595520.

The previous prime is 28036999. The next prime is 28037011. The reversal of 28037009 is 90073082.

It is not a de Polignac number, because 28037009 - 2⁴ = 28036993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28037059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36659 + ... + 37415.

It is an arithmetic number, because the mean of its divisors is an integer number (1209768).

Almost surely, 2^28037009 is an apocalyptic number.

It is an amenable number.

28037009 is a deficient number, since it is larger than the sum of its proper divisors (10675567).

28037009 is a wasteful number, since it uses less digits than its factorization.

28037009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 28037009 is about 5294.9984891405. The cubic root of 28037009 is about 303.7926253356.

The spelling of 28037009 in words is "twenty-eight million, thirty-seven thousand, nine".