40818857 has 2 divisors, whose sum is σ = 40818858. Its totient is φ = 40818856.

The previous prime is 40818839. The next prime is 40818907. The reversal of 40818857 is 75881804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32501401 + 8317456 = 5701^2 + 2884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40818857 is a prime.

It is not a weakly prime, because it can be changed into another prime (40818157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20409428 + 20409429.

It is an arithmetic number, because the mean of its divisors is an integer number (20409429).

Almost surely, 2^40818857 is an apocalyptic number.

It is an amenable number.

40818857 is a deficient number, since it is larger than the sum of its proper divisors (1).

40818857 is an equidigital number, since it uses as much as digits as its factorization.

40818857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 40818857 is about 6388.9636874848. The cubic root of 40818857 is about 344.3131528487.

The spelling of 40818857 in words is "forty million, eight hundred eighteen thousand, eight hundred fifty-seven".