40347644 has 6 divisors (see below), whose sum is σ = 70608384. Its totient is φ = 20173820.

The previous prime is 40347641. The next prime is 40347673. The reversal of 40347644 is 44674304.

It is a self number, because there is not a number n which added to its sum of digits gives 40347644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40347641) 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 as a sum of consecutive naturals, namely, 5043452 + ... + 5043459.

It is an arithmetic number, because the mean of its divisors is an integer number (11768064).

Almost surely, 2^40347644 is an apocalyptic number.

It is an amenable number.

40347644 is a deficient number, since it is larger than the sum of its proper divisors (30260740).

40347644 is a wasteful number, since it uses less digits than its factorization.

40347644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10086915 (or 10086913 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 40347644 is about 6351.9795339721. The cubic root of 40347644 is about 342.9831042799.

The spelling of 40347644 in words is "forty million, three hundred forty-seven thousand, six hundred forty-four".