28016540 has 24 divisors (see below), whose sum is σ = 59230752. Its totient is φ = 11131200.

The previous prime is 28016539. The next prime is 28016609. The reversal of 28016540 is 4561082.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1619 + ... + 7658.

It is an arithmetic number, because the mean of its divisors is an integer number (2467948).

Almost surely, 2^28016540 is an apocalyptic number.

28016540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28016540 is an abundant number, since it is smaller than the sum of its proper divisors (31214212).

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

28016540 is a wasteful number, since it uses less digits than its factorization.

28016540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9437 (or 9435 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 28016540 is about 5293.0652744889. The cubic root of 28016540 is about 303.7186773010.

The spelling of 28016540 in words is "twenty-eight million, sixteen thousand, five hundred forty".