40420207 has 4 divisors (see below), whose sum is σ = 40574160. Its totient is φ = 40266256.

The previous prime is 40420157. The next prime is 40420231. The reversal of 40420207 is 70202404.

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

It is a cyclic number.

It is not a de Polignac number, because 40420207 - 2¹¹ = 40418159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76582 + ... + 77107.

It is an arithmetic number, because the mean of its divisors is an integer number (10143540).

Almost surely, 2^40420207 is an apocalyptic number.

40420207 is a deficient number, since it is larger than the sum of its proper divisors (153953).

40420207 is a wasteful number, since it uses less digits than its factorization.

40420207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153952.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 40420207 is about 6357.6888096226. The cubic root of 40420207 is about 343.1885931725.

The spelling of 40420207 in words is "forty million, four hundred twenty thousand, two hundred seven".