40300391 has 4 divisors (see below), whose sum is σ = 40314792. Its totient is φ = 40285992.

The previous prime is 40300361. The next prime is 40300399. The reversal of 40300391 is 19300304.

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 40300391 - 2⁶ = 40300327 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 (40300399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1496 + ... + 9101.

It is an arithmetic number, because the mean of its divisors is an integer number (10078698).

Almost surely, 2^40300391 is an apocalyptic number.

40300391 is a deficient number, since it is larger than the sum of its proper divisors (14401).

40300391 is a wasteful number, since it uses less digits than its factorization.

40300391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14400.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 40300391 is about 6348.2588951617. The cubic root of 40300391 is about 342.8491574942.

Adding to 40300391 its reverse (19300304), we get a palindrome (59600695).

The spelling of 40300391 in words is "forty million, three hundred thousand, three hundred ninety-one".