40880689 has 2 divisors, whose sum is σ = 40880690. Its totient is φ = 40880688.

The previous prime is 40880641. The next prime is 40880717. The reversal of 40880689 is 98608804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25080064 + 15800625 = 5008^2 + 3975^2 .

It is a cyclic number.

It is not a de Polignac number, because 40880689 - 2²⁵ = 7326257 is a prime.

It is a super-2 number, since 2×40880689² = 3342461466229442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40880629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20440344 + 20440345.

It is an arithmetic number, because the mean of its divisors is an integer number (20440345).

Almost surely, 2^40880689 is an apocalyptic number.

It is an amenable number.

40880689 is a deficient number, since it is larger than the sum of its proper divisors (1).

40880689 is an equidigital number, since it uses as much as digits as its factorization.

40880689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 40880689 is about 6393.8008257999. The cubic root of 40880689 is about 344.4869191888.

The spelling of 40880689 in words is "forty million, eight hundred eighty thousand, six hundred eighty-nine".