40546391 has 4 divisors (see below), whose sum is σ = 40559400. Its totient is φ = 40533384.

The previous prime is 40546381. The next prime is 40546397. The reversal of 40546391 is 19364504.

40546391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40546391 - 2¹⁰ = 40545367 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 (40546397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265 + ... + 9093.

It is an arithmetic number, because the mean of its divisors is an integer number (10139850).

Almost surely, 2^40546391 is an apocalyptic number.

40546391 is a deficient number, since it is larger than the sum of its proper divisors (13009).

40546391 is an equidigital number, since it uses as much as digits as its factorization.

40546391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13008.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 40546391 is about 6367.6048087173. The cubic root of 40546391 is about 343.5453448031.

The spelling of 40546391 in words is "forty million, five hundred forty-six thousand, three hundred ninety-one".