28401039 has 12 divisors (see below), whose sum is σ = 41301000. Its totient is φ = 18806064.

The previous prime is 28401017. The next prime is 28401041. The reversal of 28401039 is 93010482.

It is not a de Polignac number, because 28401039 - 2¹² = 28396943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28401049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9249 + ... + 11930.

It is an arithmetic number, because the mean of its divisors is an integer number (3441750).

Almost surely, 2^28401039 is an apocalyptic number.

28401039 is a deficient number, since it is larger than the sum of its proper divisors (12899961).

28401039 is a wasteful number, since it uses less digits than its factorization.

28401039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21334 (or 21331 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28401039 is about 5329.2625193360. The cubic root of 28401039 is about 305.1017809554.

The spelling of 28401039 in words is "twenty-eight million, four hundred one thousand, thirty-nine".