40823857 has 2 divisors, whose sum is σ = 40823858. Its totient is φ = 40823856.

The previous prime is 40823831. The next prime is 40823891. The reversal of 40823857 is 75832804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37896336 + 2927521 = 6156^2 + 1711^2 .

It is a cyclic number.

It is not a de Polignac number, because 40823857 - 2⁷ = 40823729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40823257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20411928 + 20411929.

It is an arithmetic number, because the mean of its divisors is an integer number (20411929).

Almost surely, 2^40823857 is an apocalyptic number.

It is an amenable number.

40823857 is a deficient number, since it is larger than the sum of its proper divisors (1).

40823857 is an equidigital number, since it uses as much as digits as its factorization.

40823857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 40823857 is about 6389.3549752694. The cubic root of 40823857 is about 344.3272108569.

The spelling of 40823857 in words is "forty million, eight hundred twenty-three thousand, eight hundred fifty-seven".