28018560 has 64 divisors (see below), whose sum is σ = 89315280. Its totient is φ = 7471104.

The previous prime is 28018541. The next prime is 28018579. The reversal of 28018560 is 6581082.

It is an interprime number because it is at equal distance from previous prime (28018541) and next prime (28018579).

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5377 + ... + 9216.

Almost surely, 2^28018560 is an apocalyptic number.

28018560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28018560 is an abundant number, since it is smaller than the sum of its proper divisors (61296720).

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

28018560 is a wasteful number, since it uses less digits than its factorization.

28018560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14615 (or 14603 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 28018560 is about 5293.2560867579. The cubic root of 28018560 is about 303.7259765247.

The spelling of 28018560 in words is "twenty-eight million, eighteen thousand, five hundred sixty".