181406398 has 8 divisors (see below), whose sum is σ = 274067640. Its totient is φ = 90050520.

The previous prime is 181406383. The next prime is 181406399. The reversal of 181406398 is 893604181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 181406398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181406399) 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 3 ways as a sum of consecutive naturals, for example, 325993 + ... + 326548.

It is an arithmetic number, because the mean of its divisors is an integer number (34258455).

Almost surely, 2^181406398 is an apocalyptic number.

181406398 is a deficient number, since it is larger than the sum of its proper divisors (92661242).

181406398 is a wasteful number, since it uses less digits than its factorization.

181406398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652682.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 181406398 is about 13468.7192412642. The cubic root of 181406398 is about 566.0883275189.

The spelling of 181406398 in words is "one hundred eighty-one million, four hundred six thousand, three hundred ninety-eight".