985407186440 has 32 divisors (see below), whose sum is σ = 2217326849280. Its totient is φ = 394134309312.

The previous prime is 985407186409. The next prime is 985407186469. The reversal of 985407186440 is 44681704589.

It is a happy number.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329432 + ... + 1441991.

It is an arithmetic number, because the mean of its divisors is an integer number (69291464040).

Almost surely, 2^985407186440 is an apocalyptic number.

It is an amenable number.

985407186440 is an abundant number, since it is smaller than the sum of its proper divisors (1231919662840).

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

985407186440 is a wasteful number, since it uses less digits than its factorization.

985407186440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785341 (or 1785337 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 985407186440 in words is "nine hundred eighty-five billion, four hundred seven million, one hundred eighty-six thousand, four hundred forty".