28018470 has 16 divisors (see below), whose sum is σ = 67244400. Its totient is φ = 7471584.

The previous prime is 28018469. The next prime is 28018481. The reversal of 28018470 is 7481082.

It is a super-2 number, since 2×28018470² = 1570069322281800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 933949 = 28018470 / (2 + 8 + 0 + 1 + 8 + 4 + 7 + 0).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 466945 + ... + 467004.

It is an arithmetic number, because the mean of its divisors is an integer number (4202775).

Almost surely, 2^28018470 is an apocalyptic number.

28018470 is an abundant number, since it is smaller than the sum of its proper divisors (39225930).

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

28018470 is a wasteful number, since it uses less digits than its factorization.

28018470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933959.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 28018470 is about 5293.2475853676. The cubic root of 28018470 is about 303.7256513193.

The spelling of 28018470 in words is "twenty-eight million, eighteen thousand, four hundred seventy".