1984147855 has 8 divisors (see below), whose sum is σ = 2398107600. Its totient is φ = 1575898176.

The previous prime is 1984147853. The next prime is 1984147859. The reversal of 1984147855 is 5587414891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1984147855 - 2¹ = 1984147853 is a prime.

It is a super-2 number, since 2×1984147855² = 7873685421002202050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1984147853) by changing a digit.

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, 1426750 + ... + 1428139.

It is an arithmetic number, because the mean of its divisors is an integer number (299763450).

Almost surely, 2^1984147855 is an apocalyptic number.

1984147855 is a deficient number, since it is larger than the sum of its proper divisors (413959745).

1984147855 is a wasteful number, since it uses less digits than its factorization.

1984147855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855033.

The product of its digits is 1612800, while the sum is 52.

The square root of 1984147855 is about 44543.7745930899. The cubic root of 1984147855 is about 1256.5834744847.

The spelling of 1984147855 in words is "one billion, nine hundred eighty-four million, one hundred forty-seven thousand, eight hundred fifty-five".