40849657 has 4 divisors (see below), whose sum is σ = 43252596. Its totient is φ = 38446720.

The previous prime is 40849651. The next prime is 40849681. The reversal of 40849657 is 75694804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29800681 + 11048976 = 5459^2 + 3324^2 .

It is a cyclic number.

It is not a de Polignac number, because 40849657 - 2³ = 40849649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40849651) 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, 1201444 + ... + 1201477.

It is an arithmetic number, because the mean of its divisors is an integer number (10813149).

Almost surely, 2^40849657 is an apocalyptic number.

It is an amenable number.

40849657 is a deficient number, since it is larger than the sum of its proper divisors (2402939).

40849657 is a wasteful number, since it uses less digits than its factorization.

40849657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402938.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 40849657 is about 6391.3736395238. The cubic root of 40849657 is about 344.3997319423.

The spelling of 40849657 in words is "forty million, eight hundred forty-nine thousand, six hundred fifty-seven".