40398206 has 4 divisors (see below), whose sum is σ = 60597312. Its totient is φ = 20199102.

The previous prime is 40398203. The next prime is 40398217. The reversal of 40398206 is 60289304.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40398203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10099550 + ... + 10099553.

It is an arithmetic number, because the mean of its divisors is an integer number (15149328).

Almost surely, 2^40398206 is an apocalyptic number.

40398206 is a deficient number, since it is larger than the sum of its proper divisors (20199106).

40398206 is a wasteful number, since it uses less digits than its factorization.

40398206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20199105.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 40398206 is about 6355.9583069746. The cubic root of 40398206 is about 343.1263152251.

It can be divided in two parts, 40398 and 206, that added together give a palindrome (40604).

The spelling of 40398206 in words is "forty million, three hundred ninety-eight thousand, two hundred six".