40398306 has 16 divisors (see below), whose sum is σ = 87011904. Its totient is φ = 12430224.

The previous prime is 40398299. The next prime is 40398311. The reversal of 40398306 is 60389304.

40398306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 258886 + ... + 259041.

It is an arithmetic number, because the mean of its divisors is an integer number (5438244).

Almost surely, 2^40398306 is an apocalyptic number.

40398306 is an abundant number, since it is smaller than the sum of its proper divisors (46613598).

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

40398306 is a wasteful number, since it uses less digits than its factorization.

40398306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517945.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 40398306 is about 6355.9661736041. The cubic root of 40398306 is about 343.1265983449.

It can be divided in two parts, 40398 and 306, that added together give a palindrome (40704).

The spelling of 40398306 in words is "forty million, three hundred ninety-eight thousand, three hundred six".