28016040 has 64 divisors (see below), whose sum is σ = 90518400. Its totient is φ = 6895872.

The previous prime is 28016039. The next prime is 28016041. The reversal of 28016040 is 4061082.

It is an interprime number because it is at equal distance from previous prime (28016039) and next prime (28016041).

It is a junction number, because it is equal to n+sod(n) for n = 28015998 and 28016016.

It is not an unprimeable number, because it can be changed into a prime (28016041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7420 + ... + 10539.

It is an arithmetic number, because the mean of its divisors is an integer number (1414350).

Almost surely, 2^28016040 is an apocalyptic number.

28016040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28016040 is an abundant number, since it is smaller than the sum of its proper divisors (62502360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28016040 is a wasteful number, since it uses less digits than its factorization.

28016040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17986 (or 17982 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 28016040 is about 5293.0180426672. The cubic root of 28016040 is about 303.7168705082.

The spelling of 28016040 in words is "twenty-eight million, sixteen thousand, forty".