40449599 has 4 divisors (see below), whose sum is σ = 40462320. Its totient is φ = 40436880.

The previous prime is 40449587. The next prime is 40449601. The reversal of 40449599 is 99594404.

It is a Cunningham number, because it is equal to 6360²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40449599 - 2²⁰ = 39401023 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 (40449509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3179 + ... + 9539.

It is an arithmetic number, because the mean of its divisors is an integer number (10115580).

Almost surely, 2^40449599 is an apocalyptic number.

40449599 is a deficient number, since it is larger than the sum of its proper divisors (12721).

40449599 is an equidigital number, since it uses as much as digits as its factorization.

40449599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12720.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 40449599 is about 6359.9999213836. Note that the first 4 decimals coincide. The cubic root of 40449599 is about 343.2717574766.

The spelling of 40449599 in words is "forty million, four hundred forty-nine thousand, five hundred ninety-nine".