40403247 has 4 divisors (see below), whose sum is σ = 53871000. Its totient is φ = 26935496.

The previous prime is 40403243. The next prime is 40403257. The reversal of 40403247 is 74230404.

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 40403247 - 2² = 40403243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40403243) 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, 6733872 + ... + 6733877.

It is an arithmetic number, because the mean of its divisors is an integer number (13467750).

Almost surely, 2^40403247 is an apocalyptic number.

40403247 is a deficient number, since it is larger than the sum of its proper divisors (13467753).

40403247 is a wasteful number, since it uses less digits than its factorization.

40403247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13467752.

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 40403247 is about 6356.3548516426. The cubic root of 40403247 is about 343.1405867154.

The spelling of 40403247 in words is "forty million, four hundred three thousand, two hundred forty-seven".