161862984 has 48 divisors (see below), whose sum is σ = 464169420. Its totient is φ = 50780160.

The previous prime is 161862979. The next prime is 161862991. The reversal of 161862984 is 489268161.

161862984 is a `hidden beast` number, since 1 + 6 + 18 + 629 + 8 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 156800484 + 5062500 = 12522^2 + 2250^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64897 + ... + 67344.

Almost surely, 2^161862984 is an apocalyptic number.

It is an amenable number.

161862984 is an abundant number, since it is smaller than the sum of its proper divisors (302306436).

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

161862984 is a wasteful number, since it uses less digits than its factorization.

161862984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132270 (or 132263 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 161862984 is about 12722.5384259589. The cubic root of 161862984 is about 544.9824464789.

The spelling of 161862984 in words is "one hundred sixty-one million, eight hundred sixty-two thousand, nine hundred eighty-four".