40739685 has 32 divisors (see below), whose sum is σ = 75620352. Its totient is φ = 18342720.

The previous prime is 40739683. The next prime is 40739687. The reversal of 40739685 is 58693704.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40739683) and next prime (40739687).

It is not a de Polignac number, because 40739685 - 2¹ = 40739683 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40739681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4140 + ... + 9930.

It is an arithmetic number, because the mean of its divisors is an integer number (2363136).

Almost surely, 2^40739685 is an apocalyptic number.

It is an amenable number.

40739685 is a deficient number, since it is larger than the sum of its proper divisors (34880667).

40739685 is a wasteful number, since it uses less digits than its factorization.

40739685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5873.

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

The square root of 40739685 is about 6382.7646831134. The cubic root of 40739685 is about 344.0903995563.

The spelling of 40739685 in words is "forty million, seven hundred thirty-nine thousand, six hundred eighty-five".