40209118 has 4 divisors (see below), whose sum is σ = 60313680. Its totient is φ = 20104558.

The previous prime is 40209107. The next prime is 40209137. The reversal of 40209118 is 81190204.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 40209092 and 40209101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052278 + ... + 10052281.

It is an arithmetic number, because the mean of its divisors is an integer number (15078420).

Almost surely, 2^40209118 is an apocalyptic number.

40209118 is a deficient number, since it is larger than the sum of its proper divisors (20104562).

40209118 is a wasteful number, since it uses less digits than its factorization.

40209118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20104561.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 40209118 is about 6341.0659987103. The cubic root of 40209118 is about 342.5901316771.

The spelling of 40209118 in words is "forty million, two hundred nine thousand, one hundred eighteen".