40406207 has 4 divisors (see below), whose sum is σ = 40632120. Its totient is φ = 40180296.

The previous prime is 40406167. The next prime is 40406273. The reversal of 40406207 is 70260404.

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 40406207 - 2²⁴ = 23628991 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 (40466207) 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, 112688 + ... + 113045.

It is an arithmetic number, because the mean of its divisors is an integer number (10158030).

Almost surely, 2^40406207 is an apocalyptic number.

40406207 is a deficient number, since it is larger than the sum of its proper divisors (225913).

40406207 is a wasteful number, since it uses less digits than its factorization.

40406207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225912.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 40406207 is about 6356.5876852286. The cubic root of 40406207 is about 343.1489661684.

The spelling of 40406207 in words is "forty million, four hundred six thousand, two hundred seven".