40856739 has 36 divisors (see below), whose sum is σ = 69684552. Its totient is φ = 21215040.

The previous prime is 40856731. The next prime is 40856741. The reversal of 40856739 is 93765804.

It is a happy number.

It is not a de Polignac number, because 40856739 - 2³ = 40856731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40856739.

It is not an unprimeable number, because it can be changed into a prime (40856731) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16639 + ... + 18935.

It is an arithmetic number, because the mean of its divisors is an integer number (1935682).

Almost surely, 2^40856739 is an apocalyptic number.

40856739 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

40856739 is a deficient number, since it is larger than the sum of its proper divisors (28827813).

40856739 is a wasteful number, since it uses less digits than its factorization.

40856739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 40856739 is about 6391.9276435204. The cubic root of 40856739 is about 344.4196333576.

The spelling of 40856739 in words is "forty million, eight hundred fifty-six thousand, seven hundred thirty-nine".