28439061 has 12 divisors (see below), whose sum is σ = 44109792. Its totient is φ = 16250808.

The previous prime is 28439057. The next prime is 28439071. The reversal of 28439061 is 16093482.

It is not a de Polignac number, because 28439061 - 2² = 28439057 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28439071) 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 11 ways as a sum of consecutive naturals, for example, 96585 + ... + 96878.

It is an arithmetic number, because the mean of its divisors is an integer number (3675816).

Almost surely, 2^28439061 is an apocalyptic number.

28439061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28439061 is a deficient number, since it is larger than the sum of its proper divisors (15670731).

28439061 is a wasteful number, since it uses less digits than its factorization.

28439061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193480 (or 193473 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28439061 is about 5332.8286115344. The cubic root of 28439061 is about 305.2378723027.

The spelling of 28439061 in words is "twenty-eight million, four hundred thirty-nine thousand, sixty-one".