40685349 has 4 divisors (see below), whose sum is σ = 54247136. Its totient is φ = 27123564.

The previous prime is 40685341. The next prime is 40685357. The reversal of 40685349 is 94358604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (40685341) and next prime (40685357).

It is not a de Polignac number, because 40685349 - 2³ = 40685341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40685341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6780889 + ... + 6780894.

It is an arithmetic number, because the mean of its divisors is an integer number (13561784).

Almost surely, 2^40685349 is an apocalyptic number.

It is an amenable number.

40685349 is a deficient number, since it is larger than the sum of its proper divisors (13561787).

40685349 is a wasteful number, since it uses less digits than its factorization.

40685349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13561786.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 40685349 is about 6378.5068001845. The cubic root of 40685349 is about 343.9373562016.

The spelling of 40685349 in words is "forty million, six hundred eighty-five thousand, three hundred forty-nine".