40405198 has 8 divisors (see below), whose sum is σ = 60741792. Its totient is φ = 20157936.

The previous prime is 40405187. The next prime is 40405217. The reversal of 40405198 is 89150404.

It is a happy number.

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

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

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, 21190 + ... + 23017.

It is an arithmetic number, because the mean of its divisors is an integer number (7592724).

Almost surely, 2^40405198 is an apocalyptic number.

40405198 is a deficient number, since it is larger than the sum of its proper divisors (20336594).

40405198 is a wasteful number, since it uses less digits than its factorization.

40405198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44666.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 40405198 is about 6356.5083182515. The cubic root of 40405198 is about 343.1461098400.

The spelling of 40405198 in words is "forty million, four hundred five thousand, one hundred ninety-eight".