40798399 has 2 divisors, whose sum is σ = 40798400. Its totient is φ = 40798398.

The previous prime is 40798363. The next prime is 40798427. The reversal of 40798399 is 99389704.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40798399 - 2¹⁵ = 40765631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40798319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20399199 + 20399200.

It is an arithmetic number, because the mean of its divisors is an integer number (20399200).

Almost surely, 2^40798399 is an apocalyptic number.

40798399 is a deficient number, since it is larger than the sum of its proper divisors (1).

40798399 is an equidigital number, since it uses as much as digits as its factorization.

40798399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 40798399 is about 6387.3624447028. The cubic root of 40798399 is about 344.2556211414.

The spelling of 40798399 in words is "forty million, seven hundred ninety-eight thousand, three hundred ninety-nine".