181406364 has 12 divisors (see below), whose sum is σ = 423281544. Its totient is φ = 60468784.

The previous prime is 181406363. The next prime is 181406383. The reversal of 181406364 is 463604181.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181406363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7558587 + ... + 7558610.

It is an arithmetic number, because the mean of its divisors is an integer number (35273462).

Almost surely, 2^181406364 is an apocalyptic number.

It is an amenable number.

181406364 is an abundant number, since it is smaller than the sum of its proper divisors (241875180).

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

181406364 is a wasteful number, since it uses less digits than its factorization.

181406364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15117204 (or 15117202 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 181406364 is about 13468.7179790803. The cubic root of 181406364 is about 566.0882921526.

The spelling of 181406364 in words is "one hundred eighty-one million, four hundred six thousand, three hundred sixty-four".