28217663153320 has 32 divisors (see below), whose sum is σ = 63657261237600. Its totient is φ = 11257284080448.

The previous prime is 28217663153279. The next prime is 28217663153321. The reversal of 28217663153320 is 2335136671282.

It is not an unprimeable number, because it can be changed into a prime (28217663153321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930646554 + ... + 930676873.

It is an arithmetic number, because the mean of its divisors is an integer number (1989289413675).

Almost surely, 2^{28217663153320} is an apocalyptic number.

28217663153320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28217663153320 is an abundant number, since it is smaller than the sum of its proper divisors (35439598084280).

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

28217663153320 is a wasteful number, since it uses less digits than its factorization.

28217663153320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861323817 (or 1861323813 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 28217663153320 in words is "twenty-eight trillion, two hundred seventeen billion, six hundred sixty-three million, one hundred fifty-three thousand, three hundred twenty".