40206427 has 4 divisors (see below), whose sum is σ = 40582296. Its totient is φ = 39830560.

The previous prime is 40206421. The next prime is 40206431. The reversal of 40206427 is 72460204.

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 40206427 - 2¹¹ = 40204379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40206421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187774 + ... + 187987.

It is an arithmetic number, because the mean of its divisors is an integer number (10145574).

Almost surely, 2^40206427 is an apocalyptic number.

40206427 is a deficient number, since it is larger than the sum of its proper divisors (375869).

40206427 is a wasteful number, since it uses less digits than its factorization.

40206427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375868.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 40206427 is about 6340.8538068623. The cubic root of 40206427 is about 342.5824888782.

The spelling of 40206427 in words is "forty million, two hundred six thousand, four hundred twenty-seven".