988456221 has 12 divisors (see below), whose sum is σ = 1466358972. Its totient is φ = 641160576.

The previous prime is 988456207. The next prime is 988456229. The reversal of 988456221 is 122654889.

988456221 is a `hidden beast` number, since 9 + 8 + 84 + 562 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 735168996 + 253287225 = 27114^2 + 15915^2 .

It is not a de Polignac number, because 988456221 - 2¹⁰ = 988455197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988456229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1483836 + ... + 1484501.

It is an arithmetic number, because the mean of its divisors is an integer number (122196581).

Almost surely, 2^988456221 is an apocalyptic number.

It is an amenable number.

988456221 is a deficient number, since it is larger than the sum of its proper divisors (477902751).

988456221 is a wasteful number, since it uses less digits than its factorization.

988456221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968380 (or 2968377 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 988456221 is about 31439.7236151974. The cubic root of 988456221 is about 996.1371714351.

The spelling of 988456221 in words is "nine hundred eighty-eight million, four hundred fifty-six thousand, two hundred twenty-one".