40840861 has 8 divisors (see below), whose sum is σ = 43114880. Its totient is φ = 38579328.

The previous prime is 40840853. The next prime is 40840873. The reversal of 40840861 is 16804804.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40840861 - 2³ = 40840853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40841861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4045 + ... + 9901.

It is an arithmetic number, because the mean of its divisors is an integer number (5389360).

Almost surely, 2^40840861 is an apocalyptic number.

It is an amenable number.

40840861 is a deficient number, since it is larger than the sum of its proper divisors (2274019).

40840861 is a wasteful number, since it uses less digits than its factorization.

40840861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6243.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 40840861 is about 6390.6854874888. The cubic root of 40840861 is about 344.3750107433.

The spelling of 40840861 in words is "forty million, eight hundred forty thousand, eight hundred sixty-one".