161838432 has 96 divisors (see below), whose sum is σ = 539481600. Its totient is φ = 46237824.

The previous prime is 161838431. The next prime is 161838449. The reversal of 161838432 is 234838161.

161838432 is a `hidden beast` number, since 1 + 618 + 3 + 8 + 4 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161838431) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7332 + ... + 19427.

It is an arithmetic number, because the mean of its divisors is an integer number (5619600).

Almost surely, 2^161838432 is an apocalyptic number.

161838432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161838432 is an abundant number, since it is smaller than the sum of its proper divisors (377643168).

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

161838432 is a wasteful number, since it uses less digits than its factorization.

161838432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26785 (or 26771 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 161838432 is about 12721.5734875840. The cubic root of 161838432 is about 544.9548900744.

The spelling of 161838432 in words is "one hundred sixty-one million, eight hundred thirty-eight thousand, four hundred thirty-two".