28280218406 has 16 divisors (see below), whose sum is σ = 46285428240. Its totient is φ = 12852226080.

The previous prime is 28280218391. The next prime is 28280218411. The reversal of 28280218406 is 60481208282.

It is a super-2 number, since 2×28280218406² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

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, 1400 + ... + 237828.

It is an arithmetic number, because the mean of its divisors is an integer number (2892839265).

Almost surely, 2^28280218406 is an apocalyptic number.

28280218406 is a deficient number, since it is larger than the sum of its proper divisors (18005209834).

28280218406 is a wasteful number, since it uses less digits than its factorization.

28280218406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241879.

The product of its (nonzero) digits is 98304, while the sum is 41.

The spelling of 28280218406 in words is "twenty-eight billion, two hundred eighty million, two hundred eighteen thousand, four hundred six".