41990399 has 16 divisors (see below), whose sum is σ = 49781760. Its totient is φ = 34992000.

The previous prime is 41990383. The next prime is 41990401. The reversal of 41990399 is 99309914.

It is a Cunningham number, because it is equal to 6480²-1.

It is a cyclic number.

It is not a de Polignac number, because 41990399 - 2⁴ = 41990383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41990309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3239 + ... + 9719.

It is an arithmetic number, because the mean of its divisors is an integer number (3111360).

Almost surely, 2^41990399 is an apocalyptic number.

41990399 is a deficient number, since it is larger than the sum of its proper divisors (7791361).

41990399 is a wasteful number, since it uses less digits than its factorization.

41990399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6542.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 41990399 is about 6479.9999228395. Note that the first 4 decimals coincide. The cubic root of 41990399 is about 347.5761756989.

The spelling of 41990399 in words is "forty-one million, nine hundred ninety thousand, three hundred ninety-nine".