40678889 has 2 divisors, whose sum is σ = 40678890. Its totient is φ = 40678888.

The previous prime is 40678879. The next prime is 40678919. The reversal of 40678889 is 98887604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39904489 + 774400 = 6317^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 40678889 - 2⁸ = 40678633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40678819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20339444 + 20339445.

It is an arithmetic number, because the mean of its divisors is an integer number (20339445).

Almost surely, 2^40678889 is an apocalyptic number.

It is an amenable number.

40678889 is a deficient number, since it is larger than the sum of its proper divisors (1).

40678889 is an equidigital number, since it uses as much as digits as its factorization.

40678889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 40678889 is about 6378.0003919724. Note that the first 3 decimals coincide. The cubic root of 40678889 is about 343.9191518358.

The spelling of 40678889 in words is "forty million, six hundred seventy-eight thousand, eight hundred eighty-nine".